Fibre-coupled and packaged laser diode modules · Wavelength and power, fibre core and NA, power stability, integrated driver and cooling, and laser-class safety features
A laser diode module packages one or more semiconductor laser diodes with optics — for example coupling into an optical fibre — and with or without a driver and temperature control, ready to integrate into instruments, medical devices, pumps for fibre and solid-state lasers, or material-processing heads. Fix three things before ordering: wavelength, power and the delivery (free-space beam or fibre core and NA), the stability, drive and cooling arrangement, and the laser class and safety features the end product must carry.
Fibre-coupled and free-space laser diode modules and integrated laser systems from milliwatts to hundreds of watts. Bare laser diode chips and TO cans, complete laser cutting sources, fibre lasers and laser pointers are outside this page; laser sources for cutting machines have their own page.
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nLight lists fibre-coupled semiconductor lasers built on single-emitter diodes covering wavelengths from 640 nm to 1,550 nm and power levels up to 700 W. It rates power as watts coupled into 105 µm fibre at about 0.15 NA for a single wavelength, and offers wavelength-stabilized versions whose spectrum stays locked over a broad range of temperatures and currents for pumping. [1]
A linked maker says its modules can be fibre-coupled into multimode or single-mode fibre (and PM or liquid-core fibre on some systems), with even-beam (homogenized) versions at wavelengths including 405, 445, 457, 473, 515, 532, 635, 650, 670, 810, 940, 980 and 1,064 nm. [3] Another lists a four-wavelength single-fibre module (405, 450, 520 and 638 nm) at 20–25 mW with single-mode or multimode fibre and power stability of 3% or 1%. [4]
Editorial calculation: the beam parameter product of light filling a 105 µm core at 0.15 NA is about 52.5 µm × 0.15 ≈ 7.9 mm·mrad. A smaller core or lower NA at the same power means higher brightness, which is why fibre core and NA are part of the power specification. [1]
Give the supplier the wavelength and tolerance, output power at the fibre end (or beam), fibre core diameter, NA, connector and length (or beam size and divergence), power stability and noise, modulation needs, driver and TEC included or not, supply, cooling method, laser class and certification, and quantity.
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The linked maker's FC-W fibre-coupled systems integrate the laser diode, coupling optics, laser power supply and diode current and temperature control in one box, with adjustable power across a range quoted from 1 mW to 500 W. [3] nLight notes that wavelength-stabilized pump diodes keep their spectrum locked across temperature and current for consistent absorption. [1]
US 21 CFR 1040.10, the federal performance standard for laser products, classifies products by accessible emission. Every Class IIIb or IV laser system must have a key-actuated master control that cannot operate with the key removed, an emission indicator that signals before and during emission, and a remote interlock connector (no more than 130 V rms across its terminals) that blocks emission when open. Class II, III and IV systems need a permanently attached beam attenuator, and Class IV systems made after August 1986 need a manual reset after interlock interruption or an unexpected power loss of more than 5 seconds. [2]
Editorial note: these features apply to the laser system as sold; a module built into another product may shift some of them to the integrator. Agree in the contract who certifies the final laser class and which features the module itself provides. [2]
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Suppliers linked to this page list laser diode modules; each card links to the page reviewed.
The listings reviewed cover multi-wavelength fibre-coupled modules for surface processing and medical uses, fibre-coupled infrared diodes and integrated high-power fibre-coupled systems; ask each for output power at the fibre end, core and NA, stability, cooling and laser-class certification.
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This is a functional reference built from the sources cited; it is not one maker's specification.
| Part | Role | Fix in the order |
|---|---|---|
| Laser diodes | Wavelength and power. [1] | Wavelength; emitters. |
| Coupling optics | Launch into fibre core and NA. [1] [3] | Core; NA. |
| Fibre and connector | Delivery; SM, MM, PM. [3] [4] | Type; length; connector. |
| Driver | Current and modulation. [3] | Included or external. |
| Temperature control | Wavelength and stability. [3] [1] | TEC; cooling. |
| Safety features | Key, indicator, interlock, attenuator. [2] | Per laser class. |
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A laser diode module quotation needs values for your system. The table explains each field, gives published values where a reviewed source states them, and says what to obtain from the supplier.
| Field | What it means and published values | Ask the supplier for |
|---|---|---|
| Output Power (mW) | From 20–25 mW to hundreds of watts. [4] [1] | Power at fibre end. |
| Wavelength (nm) | 640–1,550 nm (fibre-coupled diodes); 405–1,064 nm modules. [1] [3] | Centre; tolerance. |
| Spectral Linewidth (nm) | Locked in stabilized versions. [1] | Linewidth; stabilization. |
| Beam Divergence (mrad) | Fibre NA, e.g. ~0.15. [1] | NA or divergence. |
| Operating Voltage (V DC) | Supply. | Voltage. |
| Operating Current (mA) | Diode drive current. | Current. |
| Threshold Current (mA) | Lasing threshold. | Value. |
| Operating Temperature (°C) | Cooling sets range. [3] | Range; cooling. |
| Storage Temperature (°C) | Non-operating. | Range. |
| Relative Humidity (% RH) | Condensation risk. | Range. |
| Ingress Protection | Housing rating. | Rating. |
| Package Type | Fibre-pigtailed module or integrated box. [3] | Package. |
| Weight (g) | Per module. | Weight. |
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Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Optics: [wavelength; power at output] Delivery: [fibre core; NA; connector; or beam] Stability: [power; wavelength] Drive: [driver included; modulation] Cooling: [TEC; air; water] Safety: [laser class; key; interlock; certification] Environment: [temperature; humidity] Quantity: [units]
These companies list laser diode modules.
Lists fibre-coupled laser diode modules and integrated fibre-coupled laser systems across visible and infrared wavelengths.
Product scope checked 2026-10-11
Lists multi-wavelength single-fibre laser modules for surface processing and medical uses.
Product scope checked 2026-10-11
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
nLight lists 640 to 1,550 nm; another maker lists modules from 405 to 1,064 nm. [1] [3]
nLight rates power as watts into 105 µm fibre at about 0.15 NA. [1]
21 CFR 1040.10 requires a key control, emission indicator, remote interlock connector, beam attenuator and manual reset. [2]
One maker integrates the diode, coupling optics, power supply and temperature control in one box. [3]
Sources checked 2026-10-11. nLight is a semiconductor laser maker publishing fibre-coupled diode ratings; 21 CFR 1040.10 is the US federal laser product standard; CNI and Aiming are linked makers.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
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