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A computer controlled narrow bandpass optical tunable filter using a Fourier diffraction grating in the range of 1.3-1.55 μm

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2 Author(s)
Iida, M. ; Mater. & Devices Lab., Matsushita Electr. Ind. Co. Ltd., Osaka, Japan ; Asakura, H.

A novel tunable filter using a Fourier grating is studied and discussed. It consists of a Fourier grating, a collimator lens, single-mode fibers, and a computer controlled rotary actuator. It has very low polarization dependence of less than 0.3 dB, an insertion loss of less than 3 dB, and a narrow bandwidth of 1.5 nm. Wavelength selection was realized by rotating the grating, which was controlled by a computer. The device is able to select the light at the desired wavelength from more than 100 WDM optical data streams with 2 nm spacing in the range of 1.3-1.55 μm

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Lightwave Technology, Journal of  (Volume:13 ,  Issue: 12 )