Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22040
Title: Gigahertz single source IIR microwave photonic filter based on coherence managed multi-longitudinal-mode fiber laser
Authors: Jin, Y
Feng, X
Li, F
Wang, X
Guan, B
Yuan, J
Wai, PKA 
Issue Date: 2015
Publisher: Optical Society of America
Source: Optics express, 2015, v. 23, no. 4, p. 4277-4288 How to cite?
Journal: Optics express 
Abstract: In this paper, we propose to use a multi-longitudinal-mode (MLM) laser as the source of an infinite-impulse response (IIR) microwave photonic filter (MPF) to obtain GHz level free spectral range (FSR). The response function of such an IIR-MPF and the degree of coherence of the laser are discussed theoretically. The degree of coherence of the MLM laser shows a periodic structure which is significantly different to that of single mode lasers. By engineering the degree of coherence of the MLM laser, we are able to control the stability of the IIR-MPFs with different Q factors. It is found that stable IIR-MPF with GHz level FSR can be realized with an MLM laser and its stability can be enhanced if the coherence of the laser is managed. Based on the theoretical analysis, we fabricate an IIR-MPF based on an MLM erbium doped fiber laser. The impacts of the mode spacing £G£h and the bandwidth to the stability are investigated experimentally. A stable IIR-MPF with an FSR of 0.59 GHz is realized and the relative fluctuation of the response curve is op
URI: http://hdl.handle.net/10397/22040
EISSN: 1094-4087
DOI: 10.1364/OE.23.004277
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