Millimeter-Wave Synthesizer Based on Spectral Filtering of a Phase-Modulated Laser Using a Chirped FBG With Tunable Distributed Phase-Shifts

Autor:	P. Chretien, Alexandre D. Simard, Sophie LaRochelle, Youngjae Kim
Rok vydání:	2009
Předmět:	Optical fiber Materials science Extinction ratio business.industry Physics::Optics Grating Atomic and Molecular Physics and Optics law.invention Optics Fiber Bragg grating law Fiber laser Chirp business Optical filter Passband
Zdroj:	Journal of Lightwave Technology. 27:5183-5191
ISSN:	1558-2213 0733-8724
DOI:	10.1109/jlt.2009.2029537
Popis:	We demonstrate a millimeter-wave (mm-wave) synthesizer based on spectral filtering of the plusmn2 harmonics of a phase-modulated (PM) laser. Optical filters with narrow passband, good extinction ratio and tunable peak wavelengths are obtained by introducing distributed phase-shifts in a chirped fiber Bragg grating (CFBG) using current-controlled heating elements. Detailed modeling and analysis of the filter is performed using the effective index model and coupled-mode theory. We present several optimization criteria to customize the grating design and two experimental configurations are tested. The more flexible approach is based on a fiber Mach-Zehnder structure with a tunable phase-shifted CFBG in each arm. We show generation of mm-wave from 33 GHz to 48 GHz, with a maximum frequency limited by the bandwidth of the photodetector.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cfe5b17aa4d2467174ed993872076afc https://doi.org/10.1109/jlt.2009.2029537 Zobrazit plný text záznamu