Title :
Direct Demodulation and Channel Filtering of Phase-Modulated Signals Using an Injection-Locked VCSEL
Author :
Hoghooghi, Nazanin ; Ozdur, Ibrahim ; Bhooplapur, Sharad ; Delfyett, Peter J.
Author_Institution :
CREOL & FPCE: The Coll. of Opt. & Photonics, Univ. of Central Florida, Orlando, FL, USA
Abstract :
Detection of phase-modulated optical signals without the use of an externally generated local oscillator is demonstrated using an injection-locked vertical-cavity surface-emitting laser. When it is used in a multichannel system, this technique is also capable of actively filtering out one of the phase-modulated optical carriers. The experimental results of the proposed receiver performance in a three-channel optical system are presented here. A signal-to-noise ratio of 75 dBc/Hz is obtained.
Keywords :
demodulation; optical filters; optical modulation; optical receivers; phase modulation; semiconductor lasers; surface emitting lasers; VCSEL; channel filtering; direct demodulation; injection locking; phase-modulated signals; receiver; signal-to-noise ratio; three-channel optical system; vertical-cavity surface-emitting laser; Demodulation; Filtering; Optical attenuators; Optical filters; Optical interferometry; Optical modulation; Optical receivers; Phase detection; Phase modulation; Signal generators; Stimulated emission; Vertical cavity surface emitting lasers; Detector; injection locking of oscillators; vertical-cavity surface-emitting laser (VCSEL);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2065798
