Optical switching in diffraction of partially coherent light: spectral switching

Jixiong Pu; Shojiro Nemoto

doi:10.1117/12.445075

18 October 2001 Optical switching in diffraction of partially coherent light: spectral switching

Jixiong Pu, Shojiro Nemoto

Proceedings Volume 4582, Optical Switching and Optical Interconnection; (2001) https://doi.org/10.1117/12.445075
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

Abstract

In this paper a new kind optical switch, which is called spectral switch, is presented. When a particular class of broad-band partially coherent light is diffracted by a circular aperture, the spectrum of the light in the far zone of the diffractive field is different from the spectrum at the aperture, i.e., there exists spectral shift (Delta) (omega) equals (omega) _m - (omega) ((omega) _m is the frequency at which the spectrum of the diffractive field takes its maximum, and (omega) is the frequency at which the spectrum at the aperture takes its maximum). It is demonstrated that when the spectral coherence of the light at the aperture changes, there will be gradual change in the spectral shift. However when the coherence is equal to a critical value, the spectral shift will exhibit a rapid transition. We call this phenomenon as spectral switch. The scheme for generating 1 X N spectral switch is also discussed.

Citation Download Citation

Jixiong Pu and Shojiro Nemoto "Optical switching in diffraction of partially coherent light: spectral switching", Proc. SPIE 4582, Optical Switching and Optical Interconnection, (18 October 2001); https://doi.org/10.1117/12.445075

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