Free-space, pigtailed and DFB laser diodes, plus high-power fiber-coupled modules for OEM integration. Compare wavelength, optical power, fiber type and package requirements across four families, including 3 MHz DFB devices, an 808 nm / 500 W module and a 1940 nm fiber-coupled option.
Four diode architectures
Compare the details
Compare the listed configurations and match the specifications to your setup.
47 specification rows.
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| Architecture | Wavelength range | Output power | Optical interface and defining feature |
|---|---|---|---|
| Free-space Fabry–Perot | 405–1550 nm | 20 mW–10 W | Single-mode or multimode output; low capacitance |
| Pigtailed Fabry–Perot | 380–1550 nm | 1 mW–10 W | SM, PM or MM fiber; FC/PC or FC/APC optional |
| DFB laser diode | 1290–1610 nm | 10–20 mW | 3 MHz linewidth; SM or PM fiber |
| High-power fiber-coupled module | 375–1550 nm overview; 1940 nm also listed | Up to 500 W, model dependent | Single- and multi-wavelength fiber delivery |
Family ranges describe different discrete models. Wavelength and maximum power cannot be combined freely. The high-power model table extends beyond its introductory wavelength range.
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| Part number | Wavelength (nm) | Tolerance (nm) | Power (mW) | Laser mode |
|---|---|---|---|---|
| LD-405-20 | 405 | 10 | 20 | Single mode |
| LD-450-5000-M | 450 | 10 | 5000 | Multimode |
| LD-520-135 | 520 | 10 | 135 | Single mode |
| LD-638-1200-M | 638 | 10 | 1200 | Multimode |
| LD-785-150 | 785 | 10 | 150 | Single mode |
| LD-808-10000-M | 808 | 10 | 10000 | Multimode |
| LD-1064-300 | 1064 | 10 | 300 | Single mode |
| LD-1550-20 | 1550 | 10 | 20 | Single mode |
Selected Fabry–Perot configurations. Tolerance values follow the manufacturer’s table. The complete family table is linked under Technical references.
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| Part number | Wavelength (nm) | Power (mW) | Fiber option |
|---|---|---|---|
| LDT-380-10-MM | 380 | 10 | MM |
| LDT-405-1-SM/PM | 405 | 1 | SM or PM |
| LDT-450-4000-MM | 450 | 4000 | MM |
| LDT-488-30-SM/PM | 488 | 30 | SM or PM |
| LDT-520-1200-MM | 520 | 1200 | MM |
| LDT-635-100-SM/PM | 635 | 100 | SM or PM |
| LDT-785-3000-MM | 785 | 3000 | MM |
| LDT-976-1000-SM/PM | 976 | 1000 | SM or PM |
| LDT-1064-10000-MM | 1064 | 10000 | MM |
| LDT-1550-1500-MM | 1550 | 1500 | MM |
SM = single-mode, PM = polarization-maintaining, MM = multimode. SM/PM in a part number denotes alternative fiber options. FC/PC or FC/APC termination is optional in this family.
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| Part number | Wavelength (nm) | Tolerance (nm) | Power (mW) |
|---|---|---|---|
| LD-1290-DFB-10 | 1290 | 3 | 10 |
| LD-1310-DFB-20 | 1310 | 3 | 20 |
| LD-1390-DFB-15 | 1390 | 3 | 15 |
| LD-1530-DFB-20 | 1530 | 3 | 20 |
| LD-1550-DFB-10 | 1550 | 3 | 10 |
| LD-1610-DFB-20 | 1610 | 3 | 20 |
The family specifies 3 MHz spectral linewidth and optional SM or PM fiber. The separate 3 nm tolerance column describes wavelength tolerance, not spectral linewidth.
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| Part number | Wavelength (nm) | Power (W) | Fiber core (μm) |
|---|---|---|---|
| LDM-405-8-2 | 405 | 8 | 200 |
| LDM-450-30-1 | 450 | 30 | 100 |
| LDM-520-70-4 | 520 | 70 | 400 |
| LDM-638-20-2 | 638 | 20 | 200 |
| LDM-808-500-8 | 808 | 500 | 800 |
| LDM-878.6VBG-120-2 | 878.6 | 120 | 200 |
| LDM-915-100-2 | 915 | 100 | 200 |
| LDM-940-170-1 | 940 | 170 | 105 |
| LDM-976VBG-140-1 | 976 | 140 | 105 |
| LDM-980-300-2 | 980 | 300 | 200 |
| LDM-1940-15-2 | 1940 | 15 | 200 |
| LDM-1470-980-2 | 1470 / 980 | 30 / 30 | 200 |
| LDM-1470-980-635-2 | 1470 / 980 / 635 | 15 / 15 / 0.2 | 200 |
Power is in watts in this table. For multi-wavelength modules, powers follow the wavelength order. Core diameter, numerical aperture, connector and cooling must be specified for the selected module; a core diameter alone does not define its complete fiber interface.
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| Subsystem | Selection input | Integration consequence |
|---|---|---|
| Optical output | Free-space or fiber-coupled | Sets the launch optics, alignment method and enclosure layout |
| Fiber delivery | SM, PM or MM; FC/PC or FC/APC | Determines mode matching, polarization behavior and back-reflection |
| Current control | Diode current and modulation requirement | The driver must match maximum current, compliance voltage and modulation bandwidth |
| Temperature control | TEC requirement and wavelength stability target | Temperature regulation controls wavelength drift, efficiency and operating life |
| Thermal hardware | Heat sink or cooled module | Waste heat must be removed at the selected optical power and duty cycle |
| Mechanical mounting | Package drawing and mount kit | The package must be clamped without stress and adapted to the optical table |
Build around your experiment
Share these details with your enquiry so we can match the component to your optical setup.
Application context
Laser Diode Component: high-power fiber-coupled modules concentrate pump power into a controlled fiber core, allowing the delivery numerical aperture and wavelength to be matched to the gain medium while keeping the heat-producing diode package away from the resonator.
Laser Diode Component: a 3 MHz DFB option is used when spectral selectivity and wavelength repeatability matter more than broadband optical power. The selected emission band must also match the sample transition, coatings and detector response.
Laser Diode Component: fiber-coupled power delivery simplifies routing into a process head, but wavelength, core diameter, numerical aperture and continuous or modulated power determine the achievable spot size and absorbed power density.
Laser Diode Component: compact fiber delivery can place optical energy at a remote treatment or diagnostic site. Wavelength is selected for the intended tissue or chromophore interaction, while connector, fiber, thermal control and interlocks are specified as part of the complete instrument.
Technical FAQ
No. Each part number specifies a discrete wavelength and output power. The 500 W rating belongs to LDM-808-500-8 at 808 nm with an 800 μm fiber core. The separate 1940 nm model, LDM-1940-15-2, is listed at 15 W with a 200 μm core. These are different configurations, not the endpoints of one tunable source.
The DFB family lists a spectral linewidth of 3 MHz. Its model table separately lists a wavelength tolerance of 3 nm. Linewidth describes the spectral width of the emission; tolerance describes the allowed variation in its center wavelength. Use both when selecting a diode for a narrow spectral feature.
Choose a free-space Fabry–Perot diode for direct beam access, a pigtailed diode for compact fiber delivery, a DFB diode when narrow linewidth near 1290–1610 nm is central to the measurement, or a high-power fiber-coupled module for pumping and direct-diode processing. Final selection also depends on wavelength, power, spectral width, beam or fiber parameters and modulation requirements.
Specify the wavelength and power first, then choose single-mode, polarization-maintaining or multimode fiber and the required termination. FC/PC and FC/APC are optional interfaces on the pigtailed family; they are not interchangeable because their end-face geometry and return-reflection behavior differ.
The current controller must match the diode maximum current, compliance voltage and any analog or digital modulation. Pair the package with its specified temperature controller, heat sink or cooled module so junction temperature remains within limits; do not choose a driver or mount from optical power alone.
CNI lists current controllers, temperature controllers, heat sinks and mount kits as options. The free-space page illustrates TO, C-mount, CN-mount and F-mount heat sinks. Select the hardware from the exact package drawing and thermal requirements; an M6 breadboard interface is not specified for every diode.
CNI’s family tables provide the full model lists. The high-power table also links individual module datasheets.
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