Laser Diodes & Sources
988nm PUMP Laser
The PUML series fiber-coupled laser diodes are FP-type lasers specifically designed for pumping doped fibers in EDFAs. These diodes deliver high output power and include a built-in photodiode for precise monitoring and feedback control of the laser’s output power. Encased in standard butterfly packages with TEC cooling, they are pigtailed to a 1-meter single-mode fiber terminated with an FC/APC connector. Each unit undergoes rigorous testing to ensure reliability and is available in both single-mode (SM) and polarization-maintaining (PM) fiber-coupled versions. Additionally, we offer a cost-effective, high-performance feedback control laser/TEC driver kit that maintains constant and adjustable output power, along with an externally cooled mounting fixture to stabilize the output wavelength. It is available in module or benchtop.

Configuration options
Build & quote
Configure the options below and add your exact build to the enquiry — we confirm the part number and availability.
Part number: PUML-0988112F2121
Wavelength: 988nm · Power: 150mW · Monitor: Yes · TEC Cooling: Yes · Package: 14-pin · Fiber Type: Hi1060 · Fiber Buffer: Bare · Fiber Length: 0.5m · Connector: None
System integration
Integration and compatibility
Use these checks to connect 988nm PUMP Laser to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
- Optical interface and fiber
- Fiber Type: Hi1060, PM980 · Fiber Buffer: Bare, 900um Loose Tube
- Specify connector polish and fiber architecture together. FC/PC, FC/APC and SMA interfaces, and single-mode, multimode and polarization-maintaining fibers, impose different return-loss, mode-field and alignment requirements.
- Wavelength and loss budget
- Wavelength: 988nm, 976nm
- Check the Laser Diodes & Sources passband, insertion loss, return loss and power handling at the actual source wavelength; a nominal telecom-band label is not a substitute for the configured range.
Technical FAQ
Integration questions for 988nm PUMP Laser
Which fiber and connector does the 988nm PUMP Laser use?
Fiber Type: Hi1060, PM980 · Fiber Buffer: Bare, 900um Loose Tube. Specify connector polish and fiber architecture together. FC/PC, FC/APC and SMA interfaces, and single-mode, multimode and polarization-maintaining fibers, impose different return-loss, mode-field and alignment requirements.
How should the 988nm PUMP Laser be included in an optical power budget?
Wavelength: 988nm, 976nm. Check the Laser Diodes & Sources passband, insertion loss, return loss and power handling at the actual source wavelength; a nominal telecom-band label is not a substitute for the configured range.
Need this configured?
Share your wavelength, fiber type, connector, power handling and control requirements and we will qualify the matching configuration and part number.
Model selection
Nearby series comparison
Compare 988nm PUMP Laser with the closest available models in the Laser Diodes & Sources family.
| Selection parameter | 988nm PUMP Laser (current) | 980nm Fiber Coupled FP Laser Source - 400-600mW |
|---|---|---|
| Wavelength range | 988nm, 976nm | 980nm |
| Fiber type | Hi1060, PM980 | Hi1060, PM980, 50/125 |
| Connector / control | None, FC/PC, Special | Non, FC/APC, FC/PC, Special |



