Real-time phase demodulator for optical heterodyne detection processes
- 1 February 1991
- journal article
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 2 (2) , 106-110
- https://doi.org/10.1088/0957-0233/2/2/003
Abstract
A real-time, wideband phase demodulator from which phase fluctuations extending over 2 pi radians can be taken out is designed for use in optical heterodyne detection processes. A phase-locked-loop (PLL) frequency multiplier, aided by compensation circuits to produce an unwrapped phase output, plays a major role in demodulating, in real time, the rapidly fluctuating phase from a generated beat photocurrent. The fabricated demodulator operates in the range 0 to 32 pi radians, with a minimum detectable phase (MDP) of 2 pi /128.Keywords
This publication has 1 reference indexed in Scilit:
- Phase Demodulation of a Light Beat PhotocurrentThe Review of Laser Engineering, 1980