Narrow and wide free spectral range devices based on planar reflective gratings

Serge Bidnyk; Matthew Pearson; Ashok Balakrishnan; Mae Gao

doi:10.1117/12.589339

31 March 2005 Narrow and wide free spectral range devices based on planar reflective gratings

Serge Bidnyk, Matthew Pearson, Ashok Balakrishnan, Mae Gao

Proceedings Volume 5728, Integrated Optics: Devices, Materials, and Technologies IX; (2005) https://doi.org/10.1117/12.589339
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

A new approach for constructing devices of various free spectral ranges (FSRs) is described. We show that devices with different FSRs can be built around the same aberration-free architecture based on elliptical grating facets. Elliptical facets, combined with double astigmatic point design, are demonstrated to lead to dramatic improvements in reflective grating performance compared to traditional flat facet designs. A discussion on the proper selection of the grating order for devices with various FSRs is given. The proposed theory was applied to manufacture devices with various FSRs. A standard silica-on-silicon process was used to fabricate interleavers with narrow FSR of 0.8 and 1.6 nm. Subsequently, we show how the above methodology can be used to scale the reflective grating design to devices with wide FSR. We applied the theory to produce coarse wavelength division multiplexing filters with FSR in excess of 500 nm. The filters exhibited insertion losses of 2.5 dB and polarization dependent losses of less than 0.2 dB. Applications of wide FSR devices in metro edge and access networks are discussed.

Citation Download Citation

Serge Bidnyk, Matthew Pearson, Ashok Balakrishnan, and Mae Gao "Narrow and wide free spectral range devices based on planar reflective gratings", Proc. SPIE 5728, Integrated Optics: Devices, Materials, and Technologies IX, (31 March 2005); https://doi.org/10.1117/12.589339

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