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81657A Dual Fabry-Perot Laser Source, 1310nm & 1550nm, >13dBm (20mW)

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Starting From US$ 24,377

Typical Configuration  

Typical Configuration

81657A Laser Source Module (FP) 1310/1550nm, 13dBm

  • R-51B-001-C Return to Keysight Warranty - 1 year


Prices for: United States

* Prices are subject to change without notice. Prices shown are Manufacturer's Suggested Retail Prices (MSRP). Prices shown are exclusive of taxes.

Key Features & Specifications

  • 1310 and 1550nm
  • 20mW output power
  • CW power stability: ±0.03db (24h)
  • Output attenuation


The Keysight 81657A Fabry-Perot laser sources is a dual-wavelength modules to be used in conjunction with optical power meter modules for insertion loss, optical return loss and PDL measurement of broadband components and fiber. The 81657A Fabry-Perot lasers are insensitive to back reflections and are stabilized for short and long-term applications.

For convenience there are single and dual wavelength source modules, available with an output power of up to +13dBm. The output power of the sources can be attenuated for applications where lower power is needed.