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Cavity-induced phase noise suppression in Fabry-Perot modulator-based optical frequency comb

Cavity-induced phase noise suppression in Fabry-Perot modulator-based optical frequency comb
Cavity-induced phase noise suppression in Fabry-Perot modulator-based optical frequency comb
We investigate for the first time, both theoretically and experimentally, how the phase noise of the RF drive signal affects the phase noise of the individual tones of a Fabry-Perot (F-P) modulator-based optical frequency comb. We observe that the expected deleterious effect of the RF drive signal phase noise on the comb output is partially suppressed due to the filtering characteristics of the F-P cavity. We found that the cavity-induced phase noise suppression is strongest for high-order comb tones, e.g., reaching up to 40 dB for the 100th comb tone at high offset frequencies. The phase noise suppression becomes even stronger for low RF-drive powers, or when the seed laser does not resonate in the F-P cavity. For both cases we observe up to 10dB increase in phase noise suppression. We also evaluate the timing jitter improvement obtained thanks to the cavity-induced phase noise reduction. The timing jitter (integrated from 2.5 MHz to 2.5 GHz) decreased by a factor of 7 for the beat signal obtained between two comb tones that are 100 tones apart (in comparison with the timing jitter obtained in a cavity-less comb generator).
University of Southampton
Kim, Joon-young
1bc7ecfa-8ec3-4b25-bd56-4d98009defcb
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Kim, Joon-young
1bc7ecfa-8ec3-4b25-bd56-4d98009defcb
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d

Kim, Joon-young, Richardson, David and Slavík, Radan (2017) Cavity-induced phase noise suppression in Fabry-Perot modulator-based optical frequency comb. University of Southampton doi:10.5258/SOTON/405474 [Dataset]

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Abstract

We investigate for the first time, both theoretically and experimentally, how the phase noise of the RF drive signal affects the phase noise of the individual tones of a Fabry-Perot (F-P) modulator-based optical frequency comb. We observe that the expected deleterious effect of the RF drive signal phase noise on the comb output is partially suppressed due to the filtering characteristics of the F-P cavity. We found that the cavity-induced phase noise suppression is strongest for high-order comb tones, e.g., reaching up to 40 dB for the 100th comb tone at high offset frequencies. The phase noise suppression becomes even stronger for low RF-drive powers, or when the seed laser does not resonate in the F-P cavity. For both cases we observe up to 10dB increase in phase noise suppression. We also evaluate the timing jitter improvement obtained thanks to the cavity-induced phase noise reduction. The timing jitter (integrated from 2.5 MHz to 2.5 GHz) decreased by a factor of 7 for the beat signal obtained between two comb tones that are 100 tones apart (in comparison with the timing jitter obtained in a cavity-less comb generator).

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Published date: 2017
Organisations: ORC Research, Optoelectronics Research Centre, Institute for Life Sciences

Identifiers

Local EPrints ID: 405474
URI: https://eprints.soton.ac.uk/id/eprint/405474
PURE UUID: eead4da9-638e-418f-b478-2ee2b327d01d
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262

Catalogue record

Date deposited: 17 Jan 2018 17:31
Last modified: 06 Mar 2019 01:38

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Contributors

Creator: Joon-young Kim
Creator: David Richardson ORCID iD
Creator: Radan Slavík ORCID iD

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