Keysight / Agilent 81680A Modular Tunable Laser
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Keysight / Agilent 81680A Modular Tunable Laser

This Agilent / HP 81680A Modular Tunable Laser is used and in excellent condition.

Option 071:
PMF, Panda-Type, for Straight Contact Connectors

This instrument includes the standard Agilent optical interface (View Photo). The Agilent 81000xI Series optical interface connectors are sold separately. They are available for purchase from our website here: (Item #50516).

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CE labeled RoHS Compliant
We typically stock RoHS compliant / CE marked equipment for this Keysight / Agilent 81680A.
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Stock # 69941-1
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Keysight / Agilent 81680A Modular Tunable Laser

  • Operates In The 1550 nm Band
  • Built-In Wavelength Control Loop
  • Mode-Hop Free Tunable
  • Polarization Maintaining Fiber
  • Low Spontaneous Emission


The Agilent / HP 81680A Modular Tunable Laser operates in the 1550 nm band. This module, with its built-in wavelength control loop, boasts high performance. The 81680A is mode-hop free tunable with continuous output power. This product features Panda PMF output ports to provide a well defined state of polarization to ensure constant measurement conditions on waveguide devices. A PMF cable easily connects an external optical modulator.

The 81680A is equipped with two optical outputs. One output port delivers a signal with ultra-low source spontaneous emission (SSE). It enables accurate crosstalk measurement of dense-WDM system components with many channels at narrow spacing. The second output port provides increased optical power and allows adjustment by more than 60 dB through a built-in optical attenuator.

Product Family: 81681A, 81681-A, 81681 A

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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Wavelength Range1460 nm to 1580 nm
Wavelength Resolution0.1 pm, 12.5 MHz at 1550 nm
Mode-Hop Free Tuning RangeFull Wavelength Range
Absolute Wavelength Accuracy±0.01 nm
Relative Wavelength Accuracy±5 pm, typ. ±2 pm
Wavelength Repeatability±1 pm, typ. ±0.5 pm
Wavelength Stability (typ., 24 h at const. temp.)≤ ±1 pm
Tuning Speed (typ. for a 1/10/100 nm step)400 ms/ 600 ms/ 2.8 s
Linewidth (typ.), Coherence Control Off100 kHz
Effective Linewidth (typ.), Coherence Ctrl. On> 50 MHz (1480 - 1580 nm, at maximum flat output power)

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Agilent / HP 81680A Modular Tunable LaserAgilent / HP 81680A Modular Tunable LaserAgilent / HP 81680A Modular Tunable Laser
Agilent / HP 81680A Modular Tunable Laser

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