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Double Stage Flat Passband Acousto-Optic Wavelength Filter |
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| Authors: | Hideaki Okayama Yutaka Okabe Takeshi Kamijoh |
| Affiliation: | (1) R&D Group, Oki Electric Industry Co., Ltd., 550-5, Higashiasakawa, Hachioji, Tokyo 193, Japan |
| Abstract: | We developed a flat passband acoustooptic filter. For the passband flattening, cascaded bandpass and notch filters with different mode converter lengths and conversion strengths were used. We attained a flat passband with flatness of less than 1 dB in the 2 nm range using the device with a second- to first-stage mode converter length ratio of 1.2. |
| Keywords: | wavelength filter optical waveguide acoustooptic effect cascaded structure passband flattening |
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