Double closed-loop resonant micro optic gyro using hybrid digital phase modulation
Optics Express, ISSN: 1094-4087, Vol: 23, Issue: 12, Page: 15088-15097
2015
- 53Citations
- 12Captures
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Article Description
It is well-known that the closed-loop operation in optical gyros offers wider dynamic range and better linearity. By adding a stair-like digital serrodyne wave to a phase modulator can be used as a frequency shifter. The width of one stair in this stair-like digital serrodyne wave should be set equal to the optical transmission time in the resonator, which is relaxed in the hybrid digital phase modulation (HDPM) scheme. The physical mechanism for this relaxation is firstly indicated in this paper. Detailed theoretical and experimental investigations are presented for the HDPM. Simulation and experimental results show that the width of one stair is not restricted by the optical transmission time, however, it should be optimized according to the rise time of the output of the digital-to-analogue converter. Based on the optimum parameters of the HDPM, a bias stability of 0.05°/s for the integration time of 400 seconds in 1 h has been carried out in an RMOG with a waveguide ring resonator with a length of 7.9 cm and a diameter of 2.5 cm.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84938703293&origin=inward; http://dx.doi.org/10.1364/oe.23.015088; http://www.ncbi.nlm.nih.gov/pubmed/26193493; https://opg.optica.org/abstract.cfm?URI=oe-23-12-15088; https://www.osapublishing.org/abstract.cfm?URI=oe-23-12-15088; https://www.osapublishing.org/viewmedia.cfm?URI=oe-23-12-15088&seq=0; https://dx.doi.org/10.1364/oe.23.015088; https://opg.optica.org/oe/fulltext.cfm?uri=oe-23-12-15088&id=319945; https://opg.optica.org/oe/abstract.cfm?uri=oe-23-12-15088; https://opg.optica.org/abstract.cfm?uri=oe-23-12-15088; https://opg.optica.org/viewmedia.cfm?uri=oe-23-12-15088&seq=0&html=true; https://opg.optica.org/viewmedia.cfm?uri=oe-23-12-15088&seq=0; https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-12-15088; https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-23-12-15088&id=319945
Optica Publishing Group
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