Keysight (Agilent) 81657A

| Attribute | Value |
|---|---|
| Wavelength Range | 1260 nm to 1360 nm |
| Center Wavelength | 1310 nm |
| Output Power (max) | +7 dBm |
| Modulation Bandwidth | up to 2.5 GHz |
| Connector Type | FC/PC |
| Fiber Type | Single-Mode |
| Source Type | Fabry-Perot Laser Diode |
| Module Compatibility | Keysight 8164A/B, 8166A/B Mainframes |
| Optical Isolation | Built-in optical isolator |
| Operating Temperature | 0°C to 55°C |
| Model | 81657A |
|---|
The Keysight (Agilent) 81657A is a dual-wavelength Fabry-Perot laser source module ideal for testing broadband components and fibers. It operates at 1310 nm and 1550 nm with up to +13 dBm (20 mW) output power and CW power stability of ±0.03 dB over 24 hours. It is designed to be used with optical power meter modules for insertion loss, ORL, and PDL measurements, and is resistant to back reflections for reliable results.
Output power is attenuable, supporting both single- and dual-wavelength modes for flexible testing setups across various telecom applications.
Testwall can supply the used Keysight (Agilent) 81657A, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keysight (Agilent) 81657A.





