# Fiber Coupled Diode Laser Module Market

> Fiber coupled diode laser module market: USD 1.20 billion in 2025, 6.24 million modules, growing 5.26% a year as kilowatt fiber lasers need more pump power.

Publisher: Douglas Insights  
Author: Douglas Insights Research Desk  
Report code: DI-IT-10421  
Published: 2026-10-03  
Last updated: 2026-10-03  
Next review: Apr 2027  
Page: https://www.douglasinsights.com/fiber-coupled-diode-laser-module-market/

## Key figures

| Measure | Value | How it is built |
| --- | --- | --- |
| Market size · 2025 | $1,196.8 Mn | 6.24 million modules × USD 191.8 = USD 1.20 billion |
| Forecast · 2035 | $1,997.6 Mn | Base case: 8.4% unit growth and a 2.9% yearly price decline |
| Revenue CAGR · 2026–2035 | 5.26% | 1.084 × 0.971 − 1 |
| Volume · 2035 | 13.98 million modules | 6.24 million modules growing 8.4% a year |
| Leading segment | Fiber laser pumping, 49.0% | USD 586.4 million in 2025 |
| Fastest segment | Defense and directed energy, 7.86% | HEL counter-drone programmes move toward fielding |
| Fastest region | North America, 6.21% | USD 234.6 million to USD 428.5 million |
| Market leader | IPG Photonics, 13.7% (estimate) | Douglas Insights estimate of captive pump output; top three 34.2% |
| Event | China gallium licensing from 1 Aug 2023 | Announced 3 July 2023, effective 1 August 2023, per AXT annual report |

## Key takeaways

- Fiber coupled diode laser modules are worth USD 1.20 billion in 2025: 6.24 million modules at an average USD 191.8.
- Revenue reaches USD 2.00 billion by 2035, a 5.26% CAGR from 8.4% unit growth and a 2.9% yearly price decline.
- Fiber laser pumping holds 49.0% of value; defense and directed energy grows fastest at 7.86% a year.
- North America grows 6.21% a year to USD 428.5 million and overtakes Europe, while Asia Pacific keeps 52.7% of 2025 value.
- The gallium arsenide exposure index scores North America 74 and Asia Pacific 28, with a global value-weighted score of 45.9.

Because China's export-control regulations on gallium and germanium compounds have required a licence for gallium arsenide (GaAs) shipments since 1 August 2023, the wafer under nearly every 9xx nm pump chip now travels on a permit. The fiber coupled diode laser module market covers packaged semiconductor lasers whose beam leaves through an attached optical fiber, from 2 W single-emitter devices to multi-kilowatt multi-emitter blocks, sold to fiber laser makers, medical device builders and defense integrators. Douglas Insights sizes it at USD 1.20 billion in 2025, the product of 6.24 million modules and an average USD 191.8 per module. Revenue reaches USD 2.00 billion by 2035, a 5.26% revenue CAGR in which 8.4% annual unit growth outruns a 2.9% yearly fall in price per module. AXT, a GaAs substrate maker, records in its [annual report](https://www.sec.gov/Archives/edgar/data/1051627/000143774926008612/axti20251231_10k.htm) that the rules were announced on 3 July 2023 and took effect on 1 August 2023. The study belongs to our [information technology and semiconductors coverage](https://www.douglasinsights.com/industry/ict-semiconductors/) and follows the published [research methodology](https://www.douglasinsights.com/research-methodology/).

## What sits inside a fiber coupled diode laser module, from emitter chip to fiber pigtail?

A fiber coupled diode laser module holds 1 to more than 20 GaAs-based emitters, micro-optics that stack their beams, and a 105 µm or 200 µm fiber that delivers the light. In 2025, 84.0% of the 6.24 million units counted here were 9xx nm pumps for fiber lasers.

The emitter decides the wavelength. Pump modules sit at 915 nm and 976 nm, where ytterbium-doped fiber absorbs; medical and hair-removal heads favour 808 nm; copper welding has pulled 450 nm blue modules into factories. Power classes split three ways: under 50 W, 50 W to 300 W, and above 300 W. Bare chips and free-space diode stacks sit outside the boundary, as do complete fiber lasers, though the pumps inside them count at merchant prices.

## Who builds fiber coupled pump modules, and how concentrated is supply?

The top three suppliers hold 34.2% of fiber coupled diode laser module value in 2025, on Douglas Insights estimates, because Chinese fiber laser makers buy pumps from many domestic sources. IPG Photonics leads with 13.7%, almost all of it captive pump output.

| Company | Position built on | Share 2025 (Douglas Insights estimate) | Value 2025 |
| --- | --- | --- | --- |
| IPG Photonics | Own foundry for multi-mode single-emitter pump diodes | 13.7% | USD 164.0 million |
| BWT | Merchant 9xx nm pump modules sold into Chinese fiber laser plants | 10.9% | USD 130.5 million |
| Coherent | Pump modules plus direct-diode and medical sources | 9.6% | USD 114.9 million |
| nLIGHT | Vertically integrated US semiconductor lasers, defense programmes | 5.4% | USD 64.6 million |
| Lumentum | 976 nm and 980 nm pumps for amplifiers | 3.8% | USD 45.5 million |
| Trumpf | Direct-diode lasers for welding and cladding | 3.1% | USD 37.1 million |
| Laserline | Multi-kilowatt direct-diode systems | 2.4% | USD 28.7 million |

IPG Photonics sits first because it makes its own pumps. Its [annual report](https://www.sec.gov/Archives/edgar/data/1111928/000111192826000040/ipgp-20251231.htm), filed on 23 February 2026, says the company runs a semiconductor foundry for multi-mode single-emitter diodes and packages and tests all of them; 2025 net sales were USD 1.004 billion, 29% of them in China. Douglas Insights values that captive pump output at USD 164.0 million, about 16.3% of IPG sales. The same filing names Raycus, Maxphotonics and JPT among its competitors and warns that Chinese rivals keep cutting prices. Gallium licensing has applied to Chinese exporters since 1 August 2023, so every non-Chinese pump foundry carries a wafer risk that Wuhan buyers do not.

BWT holds an estimated 10.9% as the largest merchant seller of fiber coupled pump modules into Chinese laser plants. Coherent takes 9.6% from a portfolio that spans pumps, direct-diode heads and medical sources. nLIGHT, at 5.4%, builds its semiconductor lasers in-house and leans on defense work. Lumentum earns 3.8% from amplifier pumps; Trumpf (3.1%) and Laserline (2.4%) consume their own direct-diode modules. The seven named firms hold 48.9%.

## Which segment makes the money: fiber laser pumping, direct-diode, medical or defense modules?

Fiber laser pumping makes the money, with 49.0% of 2025 fiber coupled diode laser module value, USD 586.4 million, because every kilowatt of fiber laser output needs roughly 1.4 kW of pump light. Defense and directed energy grows fastest, at 7.86% a year.

| Segment | Share 2025 | Value 2025 | CAGR 2026-2035 | Value 2035 |
| --- | --- | --- | --- | --- |
| Fiber laser pumping | 49.0% | USD 586.4 million | 4.16% | USD 881.5 million |
| Defense and directed energy | 15.7% | USD 187.9 million | 7.86% | USD 400.4 million |
| Direct-diode materials processing | 14.6% | USD 174.7 million | 6.27% | USD 320.9 million |
| Medical and aesthetic | 12.6% | USD 150.8 million | 4.93% | USD 244.0 million |
| Telecom, sensing and scientific | 8.1% | USD 96.9 million | 3.79% | USD 140.6 million |

Fiber laser pumping grows only 4.16% in value despite the fastest unit growth, since pump modules lose about 4% of price a year; it still reaches USD 881.5 million by 2035. Defense and directed energy is worth USD 187.9 million, 15.7% of value, on just 84,000 high-power modules at about USD 2,240 each, and it climbs to USD 400.4 million as high-energy laser (HEL) weapons move from demonstrators to fielded counter-drone systems. Direct-diode materials processing holds USD 174.7 million and 14.6%, because cladding, hardening and blue copper welding take the beam straight from the module. Medical and aesthetic modules earn USD 150.8 million, 12.6%, from surgical, dental and ophthalmic sources priced near USD 345. Telecom, sensing and scientific closes at USD 96.9 million and 8.1%: amplifier pumps are few in number and long-lived.

Summed, the five 2035 segment values land at USD 1.99 billion, 0.51% short of the USD 2.00 billion total. The counter-drone link is covered in our [Anti-Drone Market](https://www.douglasinsights.com/anti-drone-market/) report.

## Why are kilowatt cutting lasers pulling more pump modules every year?

Fiber coupled diode laser module units grow 8.4% a year, and kilowatt cutting lasers supply 3.4 points of that. Sheet-metal shops keep trading 6 kW sources for 12 kW to 30 kW ones, and each step doubles the pump count. Four smaller drivers add the other 5.0 points.

### Cutting power and handheld welding

Cutting power contributes 3.4 points. A 12 kW fiber laser needs about 17 kW of pump light, roughly 85 modules at 200 W each, against 43 modules for a 6 kW unit. Douglas Insights counts 5.24 million pump modules in 2025 carrying about 1.07 GW of pump power, an average of 205 W per module, and expects pump power per module to climb past 300 W by 2035. Thicker plate drives the shift. A 30 kW source cuts 50 mm carbon steel that once needed plasma, so fabricators in China, Turkey and India now specify power first and price second.

Handheld welding, marking and cleaning add 2.1 points. These tools use 1 kW to 3 kW fiber sources built in China and sold through distributors to small fabricators, so each new welder pulls 7 to 20 fiber coupled pump modules. Price makes them viable: a pump watt that cost several dollars a decade ago now sells near USD 0.55, on our price survey.

### Directed energy, medicine and direct-diode processing

Directed energy adds 1.3 points. Counter-drone HEL prototypes in the 20 kW to 50 kW class use spectrally combined fiber amplifiers, each pumped by hundreds of high-brightness modules, and the US Department of Defense funds several such programmes. A single 50 kW beam director can absorb more than 300 modules, worth over USD 670,000 at our USD 2,240 defense average. Qualification is slow, but once a module is designed into a weapon it stays for the life of the programme, often ten years or more.

Medical sources contribute 0.9 points as dental, urology and aesthetic devices replace lamp and solid-state sources with 808 nm and 980 nm fiber coupled diode laser modules; the device side is covered in our [Medical Aesthetic Devices Market](https://www.douglasinsights.com/medical-aesthetic-devices-market/) study. Direct-diode processing supplies the last 0.7 points. Blue 450 nm modules weld copper hairpins in electric motors and battery tabs, where infrared light reflects off the metal. Together the five drivers make the 8.4% unit leg: 3.4 + 2.1 + 1.3 + 0.9 + 0.7.

## Which bottlenecks in gallium arsenide wafers slow pump module volumes?

Three restraints remove 1.7 points from the fiber coupled diode laser module unit leg in the slower case, cutting it from 8.4% to 6.7% a year. Gallium licensing is the largest, worth 0.8 points, followed by machine-tool cycles and higher power per module.

Gallium supply is the first constraint. The US Geological Survey [reports](https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-gallium.pdf) that China banned all gallium exports to the United States in December 2024, after licensing began in August 2023, and that low-purity gallium in China averaged USD 380 per kg in June 2024, up 17% from USD 325 in January. US net import reliance stayed at 100%. Gallium is a trivial share of a module bill of materials; the licence queue is not. A three-month permit delay idles an epitaxy line, which is why the restraint is worth 0.8 points.

Machine-tool cycles remove 0.5 points. Sheet-metal laser cutting tracks capital spending, and a weak year in Chinese or German machinery orders defers pump module purchases for two to three quarters. Higher power per module takes the final 0.4 points: a 400 W module replaces two 200 W modules, so the same pump power needs fewer fiber coupled units.

## Where are fiber coupled diode laser modules bought, and which region grows fastest?

Asia Pacific buys 52.7% of fiber coupled diode laser module value, USD 630.7 million in 2025, because China builds most of the world's fiber lasers. North America grows fastest, at 6.21% a year, on defense demand and tariff-driven onshoring.

| Region | 2025 | 2026 | 2035 | CAGR 2026-2035 |
| --- | --- | --- | --- | --- |
| Asia Pacific | USD 630.7 million | USD 663.4 million | USD 1.05 billion | 5.19% |
| Europe | USD 262.1 million | USD 274.2 million | USD 412.1 million | 4.63% |
| North America | USD 234.6 million | USD 249.2 million | USD 428.5 million | 6.21% |
| Middle East | USD 31.1 million | USD 32.9 million | USD 55.1 million | 5.88% |
| Latin America | USD 22.7 million | USD 23.6 million | USD 33.2 million | 3.86% |
| Africa | USD 15.6 million | USD 16.2 million | USD 22.6 million | 3.78% |
| Global | USD 1.20 billion | USD 1.26 billion | USD 2.00 billion | 5.26% |

Asia Pacific rises to USD 1.05 billion by 2035 at 5.19% a year, with Wuhan, Shenzhen and Suzhou hosting most pump buyers. Europe holds USD 262.1 million, 21.9% of value, built on German direct-diode systems and machine builders, and grows 4.63%. North America starts at USD 234.6 million and reaches USD 428.5 million, overtaking Europe before 2035, as HEL programmes and domestic sourcing rules favour US-made fiber coupled modules. The Middle East is the wildcard: USD 31.1 million in 2025 growing 5.88%, because Gulf air-defense buyers are testing laser counter-drone systems and one order would reset the regional total. Latin America holds USD 22.7 million, mostly Brazilian and Mexican job shops, growing 3.86%. Africa is the smallest at USD 15.6 million, rising 3.78% a year to USD 22.6 million.

## How much does a watt of fiber coupled pump power cost buyers in 2025?

A 9xx nm fiber coupled pump watt sells near USD 0.55 in 2025, and the average fiber coupled diode laser module across all segments fetches USD 191.8, falling to USD 186.2 in 2026. Chinese competition drives the 2.9% annual decline.

Douglas Insights puts realised bands at USD 60 to USD 260 for pump modules, USD 900 to USD 2,600 for direct-diode blocks, USD 180 to USD 650 for medical sources, USD 120 to USD 700 for telecom and sensing parts, and USD 1,400 to USD 4,000 for defense-grade high-brightness pumps. Segment averages run from USD 112 for pumps to USD 2,240 for defense modules.

Brightness, not watts, sets the premium: a 200 W pump into a 105 µm fiber earns about double the per-watt price of one needing 200 µm. By 2035 the blended average falls to USD 142.9 per module even as power per module rises, so the price per watt declines faster than the price per module. Tariff layers on Chinese wafers and modules add 50% to 70% to landed cost in the United States, which widens the gap between US and Asian realised prices.

## Does the gallium licence regime reach the cost of a fiber coupled pump chip?

Gallium metal adds well under 1% to the cost of a fiber coupled diode laser module, yet licence timing decides delivery dates. Douglas Insights estimates that a six-inch GaAs wafer yields several thousand pump chips, so a USD 420 per kg gallium price barely moves the bill.

Wafer access is the real exposure. AXT, whose Tongmei subsidiary needs Chinese export permits, notes that its semi-conducting GaAs substrates feed high-power industrial lasers for material processing. Indium phosphide (InP) matters for the telecom slice: China added InP substrates to its control list, which touches 1,4xx nm and 1,5xx nm sources used in sensing and eye-safe ranging. For 976 nm pump modules the risk stays on GaAs.

## Which export rules and laser safety standards govern fiber coupled modules?

Four trade measures since 2023 shape fiber coupled diode laser module supply: China's gallium licensing, its ban on US-bound gallium, its InP substrate control, and US tariffs that reached 70% on Chinese wafers.

AXT's [2025 annual report](https://www.sec.gov/Archives/edgar/data/1051627/000143774926008612/axti20251231_10k.htm) sets out the sequence: rules announced on 3 July 2023 and effective on 1 August 2023; further restrictions on 3 December 2024; InP substrates added on 4 February 2025; and a Foreign Trade Law amendment on 27 December 2025. Its Chinese subsidiary received its first InP export permits on 11 June 2025. On the US side, the tariff on its Chinese-made wafers rose to 50% on 1 January 2025, 60% on 1 February 2025 and 70% on 4 March 2025.

The Section 301 [notice of 18 September 2024](https://www.federalregister.gov/documents/2024/09/18/2024-21217/notice-of-modification-chinas-acts-policies-and-practices-related-to-technology-transfer-intellectual-property-and-innovation) raised duties on 16 semiconductor subheadings to 50% for goods entered from 1 January 2025. Buyers now ask for the country of the wafer as well as of assembly. Product safety is separate. Most pump modules are Class 4 sources, but they ship as components; the laser system maker certifies the finished product under US performance standards or IEC 60825-1 elsewhere.

## What if gallium permits tighten again: where do fiber coupled modules land in 2035?

The base case puts fiber coupled diode laser module revenue at USD 2.00 billion in 2035, on 8.4% unit growth and a 2.9% annual price decline, with volume reaching 13.98 million modules. Gallium permits are the swing factor.

| Case | Unit leg | Price leg | 2035 value |
| --- | --- | --- | --- |
| Slower | 6.7% | -3.6% | USD 1.59 billion |
| Base | 8.4% | -2.9% | USD 2.00 billion |
| Faster | 10.1% | -2.3% | USD 2.48 billion |

The slower case assumes the licence regime that [took effect on 1 August 2023](https://www.sec.gov/Archives/edgar/data/1051627/000143774926008612/axti20251231_10k.htm) tightens into multi-month delays for Western foundries and that Chinese pump prices fall 3.6% a year; revenue stops at USD 1.59 billion. The faster case adds fielded HEL weapons in three or more countries and a sheet-metal upswing, lifting revenue to USD 2.48 billion. Volume is the lever that counts. One extra point of annual unit growth lifts 2035 revenue to USD 2.19 billion, USD 192.1 million above base; one point less leaves USD 1.82 billion. Our 5.26% revenue CAGR is deliberately cautious: unit growth of 8.4% would give 8.4% revenue growth if pump prices held, and they will not.

## Douglas Exclusive: the gallium arsenide exposure index

The gallium arsenide exposure index is a Douglas Insights model scoring regional fiber coupled diode laser module supply from 0 to 100. A high score means more of the GaAs wafers behind a region's modules cross a Chinese export licence. It is built from 33 inputs: 24 regional data points, 5 segment weights and 4 dated rule changes.

| Region | Wafers crossing a Chinese licence | Wafer inventory (weeks) | Index score |
| --- | --- | --- | --- |
| North America | 38% | 9 | 74 |
| Middle East | 51% | 7 | 66 |
| Europe | 46% | 11 | 61 |
| Latin America | 43% | 8 | 52 |
| Africa | 40% | 8 | 47 |
| Asia Pacific | 14% | 6 | 28 |

The index weights each region's share of licence-crossing wafers by its tariff layer and divides by inventory cover. North America scores 74 because US tariffs stack on top of the licence and the 2024 ban closed the direct route. Asia Pacific scores 28: Chinese foundries buy domestic gallium without an export permit. By segment, defense modules score 81 and pump modules 33.

The finding: the value-weighted global index is 45.9 in 2025 and rises to 46.3 by 2035, because demand shifts toward the most exposed region. Regions scoring 60 or more already hold 44.1% of fiber coupled diode laser module value. Western module makers that qualify a second, non-Chinese GaAs wafer source before 2028 protect the fastest-growing part of their order book.

## Which receipts and cross-checks support the 6.24 million module count?

The model multiplies 6.24 million fiber coupled diode laser modules by USD 191.8 each to reach USD 1,196,832,000, rounded to USD 1.20 billion for 2025. It covers 6 regions, 26 countries and 5 application segments.

Douglas Insights draws on 186 data points: company filings, pump power per laser class, module counts per laser, segment price bands and tariff schedules. Units by segment are 5.24 million pump modules, 436,000 medical, 362,000 telecom and sensing, 118,000 direct-diode and 84,000 defense modules.

Three cross-checks follow. Pump power of 1.07 GW implies about 0.75 GW of fiber laser output at 70% conversion, matching our laser shipment build within 3%. IPG captive pump value of USD 164.0 million equals 16.3% of its USD 1.004 billion sales, inside the 12% to 20% diode cost share we see for fiber lasers. Multiplying 1.084 by 0.971 and subtracting one returns the 5.26% revenue rate. Sensing demand is benchmarked against our [Tunable Diode Laser Analyzer Market](https://www.douglasinsights.com/tunable-diode-laser-analyzer-market/) study.

## Market by segment

| Segment | Share | Value |
| --- | --- | --- |
| Fiber laser pumping | 49% | $586.4 Mn |
| Defense and directed energy | 15.7% | $187.9 Mn |
| Direct-diode materials processing | 14.6% | $174.7 Mn |
| Medical and aesthetic | 12.6% | $150.8 Mn |
| Telecom, sensing and scientific | 8.1% | $96.9 Mn |

## Market by region (USD million)

| Region | 2025 | 2026 | 2035 | CAGR 2026-2035 |
| --- | --- | --- | --- | --- |
| Global | 1,196.8 | 1,259.8 | 1,997.6 | 5.26% |
| Asia Pacific | 630.7 | 663.4 | 1,046.1 | 5.19% |
| Europe | 262.1 | 274.2 | 412.1 | 4.63% |
| North America | 234.6 | 249.2 | 428.5 | 6.21% |
| Middle East | 31.1 | 32.9 | 55.1 | 5.88% |
| Latin America | 22.7 | 23.6 | 33.2 | 3.86% |
| Africa | 15.6 | 16.2 | 22.6 | 3.78% |

## Dataset

| Series | Value | Unit |
| --- | --- | --- |
| Market size 2025 | 1,196.8 | USD million |
| Market size 2035 | 1,997.6 | USD million |
| Revenue CAGR 2026-2035 | 5.26 | percent |
| Volume CAGR 2026-2035 | 8.4 | percent |
| Price per module CAGR 2026-2035 | -2.9 | percent |

## Frequently asked questions

### What does one watt of 9xx nm pump power cost in 2025?

USD 0.55 per watt on Douglas Insights price surveys, with pump modules selling from USD 60 to USD 260 depending on power and fiber brightness.

### How many fiber coupled diode laser modules shipped in 2025?

6.24 million modules, which at an average USD 191.8 each gives a 2025 value of USD 1.20 billion.

### What will fiber coupled diode laser modules be worth in 2035?

USD 2.00 billion in the base case, up from USD 1.20 billion in 2025, a 5.26% revenue CAGR from 8.4% unit growth and a 2.9% annual price decline.

### Why do China's gallium export rules matter to pump module makers?

1 August 2023 is when China's licensing of gallium compounds took effect; GaAs wafers under most pump chips now need export permits, and a December 2024 rule banned gallium exports to the United States.

### Which application pays the highest price per module?

USD 2,240 on average for defense and directed energy modules, against USD 112 for fiber laser pumps, because HEL weapons need high-brightness, qualified parts.

### Will North America overtake Europe in module spending?

6.21% annual growth lifts North America from USD 234.6 million to USD 428.5 million by 2035, ahead of Europe at USD 412.1 million.

### How many pump modules does a 12 kW cutting laser use?

About 85 modules of 200 W, supplying roughly 17 kW of pump light, against 43 modules for a 6 kW laser.

### How exposed is Western module supply to the gallium licence?

74 out of 100 for North America on the Douglas Insights gallium arsenide exposure index, against 28 for Asia Pacific; the global value-weighted score is 45.9.

### How concentrated is fiber coupled diode laser module supply?

34.2% of 2025 value sits with IPG Photonics, BWT and Coherent on Douglas Insights estimates; IPG leads with 13.7%, mostly captive pumps.

## Sources

- [AXT Inc. via SEC EDGAR, AXT Inc. annual report on Form 10-K for 2025 (China export controls on gallium, GaAs and InP)](https://www.sec.gov/Archives/edgar/data/1051627/000143774926008612/axti20251231_10k.htm)
- [IPG Photonics via SEC EDGAR, IPG Photonics annual report on Form 10-K for 2025](https://www.sec.gov/Archives/edgar/data/1111928/000111192826000040/ipgp-20251231.htm)
- [US Geological Survey, Mineral Commodity Summaries 2025: Gallium](https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-gallium.pdf)
- [US Geological Survey, Mineral Commodity Summaries 2024: Gallium](https://pubs.usgs.gov/periodicals/mcs2024/mcs2024-gallium.pdf)
- [Office of the US Trade Representative, Federal Register, Notice of Modification: China's Acts, Policies and Practices (Section 301)](https://www.federalregister.gov/documents/2024/09/18/2024-21217/notice-of-modification-chinas-acts-policies-and-practices-related-to-technology-transfer-intellectual-property-and-innovation)

## How to cite

Douglas Insights, "Fiber Coupled Diode Laser Module Market", DI-IT-10421, updated 2026-10-03, https://www.douglasinsights.com/fiber-coupled-diode-laser-module-market/