Compact millimeter-wavelength Fourier-transform spectrometer
Abstract
We have constructed a Fourier-transform spectrometer (FTS) operating between 50 GHz and 330 GHz with minimum volume (355×260×64 mm) and weight (5.9 kg) while maximizing optical throughput (100 mm^2 sr) and optimizing the spectral resolution (4 GHz). This FTS is designed as a polarizing Martin–Puplett interferometer with unobstructed input and output in which both input polarizations undergo interference. The instrument construction is simple with mirrors milled on the box walls and one motorized stage as the single moving element. We characterize the performance of the FTS, compare the measurements to an optical simulation, and discuss features that relate to details of the FTS design. The simulation is also used to determine the tolerance of optical alignments for the required specifications. We detail the FTS mechanical design and provide the control software as well as the analysis code online.
Additional Information
© 2019 Optical Society of America. Received 20 May 2019; revised 11 July 2019; accepted 11 July 2019; posted 12 July 2019 (Doc. ID 367920); published 6 August 2019. Funding: National Science Foundation (NSF) (PHY-1125897, PLR-1248097); Kavli Foundation; Gordon and Betty Moore Foundation (GBMF 947). The authors thank John Carlstrom for his instrument and useful discussions.Attached Files
Submitted - 1905.07399.pdf
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Additional details
- Eprint ID
- 98375
- DOI
- 10.1364/AO.58.006257
- Resolver ID
- CaltechAUTHORS:20190830-132055666
- PHY-1125897
- NSF
- PLR-1248097
- NSF
- Kavli Foundation
- 947
- Gordon and Betty Moore Foundation
- Created
-
2019-08-30Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field