Binary blazed grating-based polarization-independent filter on silicon on insulator

doi:10.1007/s12200-012-0199-4

Front Optoelec

2012, Vol. 5

Issue (1) : 78-81 https://doi.org/10.1007/s12200-012-0199-4

RESEARCH ARTICLE

Binary blazed grating-based polarization-independent filter on silicon on insulator

Danhua WU, Xin SUI, Junbo YANG, Zhiping ZHOU(

)

The State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China

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Abstract

In this paper, a binary blazed grating-based polarization independent filter on silicon on insulator (SOI) under full conical incidence is presented. The properties of the grating filter are investigated by rigorous coupled-wave analysis. It’s shown that the filter demonstrates high reflectivity (R>99%) at its resonant wavelength, which stays the same under three different polarization states. It indicates that this grating filter is polarization-independent. The final data shows its polarization-dependent loss (PDL) is only 0.04 dB and the full width at half maximums (FWHMs) of the transverse electric (TE-) and transverse magnetic (TM-) polarized light are 0.24 and 0.46 nm, respectively.

Keywords narrow filter binary blazed grating full conical incidence polarization-independent

Corresponding Author(s): ZHOU Zhiping,Email:zjzhou@pku.edu.cn

Issue Date: 05 March 2012

Cite this article:

Junbo YANG,Zhiping ZHOU,Danhua WU, et al. Binary blazed grating-based polarization-independent filter on silicon on insulator[J]. Front Optoelec, 2012, 5(1): 78-81.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-012-0199-4
https://academic.hep.com.cn/foe/EN/Y2012/V5/I1/78

Fig.1 Coordinate system for binary blazed grating in conical mounting

Fig.2 Full conical incidence for resonant excitation of two identical guided-modes

Fig.3 Scheme of SOI-based polarization-independent filter using binary blazed grating

Tab.1 Optimized parameters of grating filter

Fig.4 PDL curves under different grating periods and depths. (a) As a function of grating period. All other parameters are the same as those in Table 1; (b) as a function of grating depth. All other parameters are the same as those in Table 1

Fig.5 Spectral reflectivity of the filter based on binary blazed grating

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