HP 81554SM Dual Laser Source for mainframes 8153, 8163, 8164, 8166.
Specs at glance of the 81554SM

- Type of Laser: FP Laser, InGaAsP
- Output Power: >-1dBm
- Central Wavelength: 1310 nm +/- 20 nm and 1550 nm +/- 20 nm
- Spectral Bandwidth: <2.5 nm rms
- Fiber Type: 9/125 um