Ponnampalam, L;
Fice, M;
Shams, H;
Renaud, C;
Seeds, A;
(2018)
Optical comb for generation of a continuously tunable coherent THz signal from 122.5 GHz to > 2.7 THz.
Optics Letters
, 43
(11)
pp. 2507-2510.
10.1364/OL.43.002507.
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Abstract
We present a continuously tunable optical frequency comb generator (OFCG), with comb lines spanning over 3.8 THz which, to the best of our knowledge, is the widest span yet reported for a single-phase modulator OFCG system. The line spacing, exactly determined by a microwave reference, can be continuously tuned and, by heterodyning two lines, enables the generation of a continuously tunable electrical signal from 122.5 GHz to >2.7 THz. The composite noise of the heterodyne between two lines has been measured up to a record frequency of 300 GHz and is −75 dBc/Hz at 10 kHz offset at 300 GHz, limited by the multiplied phase noise of the reference synthesizer.
| Type: | Article |
|---|---|
| Title: | Optical comb for generation of a continuously tunable coherent THz signal from 122.5 GHz to > 2.7 THz |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/OL.43.002507 |
| Publisher version: | https://doi.org/10.1364/OL.43.002507 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059356 |
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