科研之友
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摘要
In this work, a compact and ultrahigh-resolution Fourier-transform spectrometer design is presented which is in great demand in numerous areas. The spectrometer is formed by sequentially-activated 60 Mach-Zehnder interferometers that are connected to photodetectors through very-low-loss beam combiners based on two-mode interference. The long optical delays are provided by tapping the propagating light out at certain locations on the optical waveguides by using electro-optically-controlled directional couplers. A design example with a spectral resolution of 500 MHz (similar to 1 pm) and bandwidth of 15 GHz is presented for a device size of only 2 cm x 0.5 cm (1 cm(2)).
- 出版日期2017-1-23
