Han, Young-Geun Dong, Xinyong Lee, Ju Han Lee, Sang Bae 2024-01-21T01:36:34Z 2024-01-21T01:36:34Z 2021-09-05 2006-12-15 0146-9592 https://pubs.kist.re.kr/handle/201004/134815 We propose and experimentally demonstrate a simple and flexible scheme for a wavelength-spacing-tunable multichannel filter exploiting a sampled chirped fiber Bragg grating based on a symmetrical modification of the chirp ratio. Symmetrical bending along a sampled chirped fiber Bragg grating attached to a flexible cantilever beam induces a variation of the chirp ratio and a reflection chirp bandwidth of the grating without a center wavelength shift. Accordingly, the wavelength spacing of a sampled chirped fiber Bragg grating is continuously controlled by the reflection chirp bandwidth variation of the grating corresponding to the bending direction, which allows for realization of an effective wavelength-spacing-tunable multichannel filter. Based on the proposed technique, we achieve the continuous tunability of the wavelength spacing in a range from 1.51 to 6.11 nm, depending on the bending direction of the cantilever beam. (c) 2006 Optical Society of America. English OPTICAL SOC AMER COMB FILTER LASER Wavelength-spacing-tunable multichannel filter incorporating a sampled chirped fiber Bragg grating based on a symmetrical chirp-tuning technique without center wavelength shift Article 10.1364/OL.31.003571 1 OPTICS LETTERS, v.31, no.24, pp.3571 - 3573 OPTICS LETTERS 31 24 3571 3573 scie scopus 000242560400003 2-s2.0-33846154237 Optics Optics Article COMB FILTER LASER