A sampled grating in an SOI waveguide for narrow-band tunable wavelength filters

Kato, Akifumi; Nakatsuhara, Katsumi; Nakagami, T.

doi:10.1364/oecc_ps.2013.thl3_6

Cited by 1 publication

(2 citation statements)

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“…[8][9][10] We have been studying silicon waveguide devices that have FLC cladding. [11][12][13][14] The use of Bragg reflector waveguides enables high levels of control of the transmission bandwidth, which can be adjusted by controlling the coupling coefficient of the periodic structure. [15][16][17] Tunable wavelength filters using a sampled grating structure with subgratings have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…18) We previously proposed and fabricated silicon grating waveguides with FLC cladding. 13,14) A tunable wavelength filter array combined with a 1 © 6 multimode interference (MMI) splitter with a sampled grating structure is proposed in the present paper. Devices with the same grating structure and different waveguide widths to achieve different operating wavelengths were fabricated for a preliminary experiment.…”

Section: Introductionmentioning

confidence: 99%

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Bragg reflector waveguide array with ferroelectric liquid crystal cladding for optical tunable wavelength filters

Nakatsuhara

Kato

Yoshiki

2014

Jpn. J. Appl. Phys.

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A tunable wavelength filter array is proposed, which consists of a 1 ' 6 multimode interferometer silicon waveguide splitter and Bragg reflector waveguides with ferroelectric liquid crystal (FLC) cladding. The transmission characteristics of the proposed device were reported, which were theoretically and experimentally obtained. Different operating wavelengths were obtained by using different waveguide widths with the same grating period. The stop bandwidth we obtained with a sampled grating was narrower than that in conventional uniform grating structures. Bistable tuning operation with a 0.8 nm shift in wavelength characteristics, which had six different Bragg wavelengths, was demonstrated. The distribution of the optical axis in the FLC cladding layer was also measured using a system for birefringence measurements.

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