Optical interleavers based on nested prism pairs structure

Juan Zhang

doi:10.1117/12.745724

21 November 2007 Optical interleavers based on nested prism pairs structure

Juan Zhang

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67814V (2007) https://doi.org/10.1117/12.745724
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

A novel flat-top and low dispersion optical interleaver using ring cavities (RCs) in a Mach-Zehnder interferometer is proposed. It is composed of eight mirrors and two nested prism pairs. Each prism and two mirrors behave as a RC. The phase shift of RC is periodic function of the frequency of the input light which acts as phase dispersive mirror. The two phase shifts needed to achieve a flat-top spectral passband is provided by the Fresnel reflectivities at the prism-air interface of the two RCs. The optimum interface reflectivities for flat passband, high isolation and low dispersion can be obtained only by choosing the appropriate material of the prism in each RC. The proposed novel interleaver in a 25GHz channel spacing application exhibits a 0.5dB passband larger than 24 GHz (96% of the spacing), a 30 dB stopband greater than 21.2 GHz (84.8% of the spacing), a channel isolation higher than 32 dB and chromatic dispersion ±50 ps/nm within center-frequency ± 2GHz ITU passband. It's the best result demonstrated at the present time.

Citation Download Citation

Juan Zhang "Optical interleavers based on nested prism pairs structure", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67814V (21 November 2007); https://doi.org/10.1117/12.745724

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