首页|Flat-top and low-dispersion optical interleavers based on nested prism pair structure

Flat-top and low-dispersion optical interleavers based on nested prism pair structure

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A novel flat-top and low-dispersion optical interleaver using ring cavities (RCs) in a Mach-Zehnder interferometer (MZI) is proposed. It is composed of eight mirrors and two nested prism pairs. Each prism and the two mirrors behave as a RC. Phase shift of RC is a periodic function of the frequency of the input light which acts as a phase dispersive mirror. The two phase shifts needed to achieve a flat-top spectral passband are provided by 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 an appropriate material for the prism in each RC. The proposed interleaver in a 25 GHz channel spacing application exhibits a 0.5 dB passband greater 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 the range of center-frequency ±2 GHz ITU passband.

optical filterinterleaverdense wavelength-division multiplexing (DWDM)resonant cavitydispersion

ZHANG Juan

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Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai 200072, P. R. China

Projet supported by the National Natural Science Foundation of ChinaInnovation Program of Education Commission of Shanghai MunicipalityShanghai Leading Academic Discipline Project

1080407009YZ06S30108

2011

10.1007/s11741-011-0686-3

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2011.15(1)
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