3 February 2017 Digital implementation of a laser frequency stabilisation technique in the telecommunications band
Author Affiliations +
Proceedings Volume 10036, Fourth Conference on Sensors, MEMS, and Electro-Optic Systems; 100360Y (2017) https://doi.org/10.1117/12.2242627
Event: Fourth Conference on Sensors, MEMS and Electro-Optic Systems, 2016, Skukuza, Kruger National Park, South Africa
Abstract
Laser frequency stabilisation in the telecommunications band was realised using the Pound-Drever-Hall (PDH) error signal. The transmission spectrum of the Fabry-Perot cavity was used as opposed to the traditionally used reflected spectrum. A comparison was done using an analogue as well as a digitally implemented system. This study forms part of an initial step towards developing a portable optical time and frequency standard.

The frequency discriminator used in the experimental setup was a fibre-based Fabry-Perot etalon. The phase sensitive system made use of the optical heterodyne technique to detect changes in the phase of the system. A lock-in amplifier was used to filter and mix the input signals to generate the error signal. This error signal may then be used to generate a control signal via a PID controller. An error signal was realised at a wavelength of 1556 nm which correlates to an optical frequency of 1.926 THz. An implementation of the analogue PDH technique yielded an error signal with a bandwidth of 6.134 GHz, while a digital implementation yielded a bandwidth of 5.774 GHz.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pritesh Jivan, Pritesh Jivan, Adriaan van Brakel, Adriaan van Brakel, Rodolfo Martínez Manuel, Rodolfo Martínez Manuel, Michael Grobler, Michael Grobler, } "Digital implementation of a laser frequency stabilisation technique in the telecommunications band", Proc. SPIE 10036, Fourth Conference on Sensors, MEMS, and Electro-Optic Systems, 100360Y (3 February 2017); doi: 10.1117/12.2242627; https://doi.org/10.1117/12.2242627
PROCEEDINGS
6 PAGES


SHARE
Back to Top