| 摘要 |
A multi-pass Fabry-Perot etalon, or bandpass, filter, has a Fabry-Perot cavi ty defined by two partially reflective mirrors with a gap therebetween and a third reflecting mirror positioned adjacent said two mirrors and arranged to reflect substantially any light ex iting said cavity back into it. The filter can replace two single-pass Fabry-Perot etalon filt ers and can provide lower signal loss and simpler wavelength control.
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