Title :
A simple technique for real time spectral corrections and noise reduction
Author :
Donchev, V. ; Mazilu, M. ; Miller, A.
Author_Institution :
Dept. of Phys. & Astron., St. Andrews Univ., UK
Abstract :
We propose a simple technique for simultaneous recording of two optical beams using a single optical chopper, detector and lock-in amplifier. The new feature of our method is based on chopping the two beams with the same frequency but with a phase shift. The corresponding electrical signals from the detector are measured as the in-phase and the quadrature signal by the lock-in amplifier
Keywords :
optical elements; optical noise; optical testing; photodetectors; in-phase signal; lock-in amplifier; optical chopper; optical noise reduction; optical testing; phase shift; photodetector; quadrature signal; real time spectral corrections; Choppers; Frequency; Optical amplifiers; Optical beams; Optical detectors; Optical noise; Optical recording; Semiconductor optical amplifiers; Signal detection; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1998. LEOS '98. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-4947-4
DOI :
10.1109/LEOS.1998.739494
