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Optical Engineering

Microwave photonic bandpass filter using a multiwavelength semiconductor-optical-amplifier ring laser
Author(s): Duan Liu; Nam Quoc Ngo; Swee Chuan Tjin
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Paper Abstract

This paper presents the proposal and experimental demonstration of a microwave photonic bandpass filter structure based on a multiwavelength semiconductor optical amplifier (SOA) ring laser, an optical phase modulator, and a segment of single-mode fiber as a dispersive element. Experimental results show multiple-tap microwave photonic bandpass filter by using a power-equalized multiwavelength SOA ring laser as the optical source. Two laser configurations, one with a linearly chirped fiber Bragg grating (LCFBG) to compensate the dispersion of the laser cavity and one without the LCFBG, are compared for their multiwavelength laser outputs and the corresponding microwave photonic bandpass filters' response. The two microwave photonic bandpass filters have free spectral ranges (FSRs) ~1.26 GHz and 1.85 GHz. The maximal main-to-secondary sidelobe ratio of the microwave filter is above 10 dB.

Paper Details

Date Published: 1 May 2007
PDF: 4 pages
Opt. Eng. 46(5) 054401 doi: 10.1117/1.2720821
Published in: Optical Engineering Volume 46, Issue 5
Show Author Affiliations
Duan Liu, Nanyang Technological Univ. (Singapore)
Nam Quoc Ngo, Nanyang Technological Univ. (Singapore)
Swee Chuan Tjin, Nanyang Technological Univ. (Singapore)

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