Attachment 1 - Specifications - Far-Infrared Dual Frequency Comb System.pdf

Requirements / Specification Document

TITLE: Far-Infrared Dual Frequency Comb System

Requesting Laboratory / Division / Group:

Communications Technology Laboratory Spectrum Technology and Research Division 675

Fiber Sources and Applications Group, 675.02

General Statement of Need:

The Fiber Sources and Applications group has been pursuing a novel form of spectroscopy, dual-comb spectroscopy, for a number of years. This technique can support measurements of greenhouse gases as well as many other atmospheric gases related to air quality and climate change. However, thus far efforts have been limited to the near infrared (1-2 micrometers in wavelength) and the mid-infrared (3-5 micrometers). The far infrared spectral region covering from beyond 5 micrometers out to 20 micrometers would allow detection of a much wider range of atmospheric gases which could improve our scientific understanding of both climate change and air quality. To this end, the group requires a coherent dual-frequency comb system that operates in the far infrared spectral region, with sufficient optical coherence for high signal-to-noise ratio measurements, and sufficient optical power to make measurements over long free-space air paths.

Item Specifications and Quantities:

Item 1: Far infrared dual frequency comb system Quantity: 1 dual comb system (comprising 2 frequency combs) Specifications: 1.1 75-200 MHz repetition rate

1.2 10,000 nm center wavelength

1.3 10-20 THz spectral bandwidth

1.4 < 500 fs pulse duration

1.5 100 mW optical power

1.6 Single spatial mode output in TEM00 mode

1.7 < 1 kW power consumption

1.8 Turn-key operation

1.9 Rack mounted electronics

1.10 Phase locked stabilization of the carrier envelope offset frequency and of an optical comb tooth to a cw reference laser

1.11 Sub-Hz relative optical linewidth between the dual combs when phase locked

Procurement Support Information and Ancillary Services:

Section Requirements/Specifications

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☒ Delivery Shall Be Competed No Later Than:

12/27/2023 ☐ Delivery Shall Be Made No Earlier Than:

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