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24 January 2019 Study on wavelength division multiplexing with chirped volume Bragg gratings
Qinfeng Xu, Baoxing Xiong, Changwei Guo, Feng Xu, Guiju Zhang, Kuaisheng Zou
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Proceedings Volume 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics; 108400J (2019) https://doi.org/10.1117/12.2507593
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China
Abstract
In order to study the spatial wavelength division diffraction effect, the Chirped Volume Bragg Gratings (CVBG) based on the Photo-thermo-refractive glass on the oblique incident light was analyzed by the fundamental matrix method. When diffracted by grating, the complex beam would be separated into multiple beams in space by wavelength. The diffraction efficiency of the separated optical wave can reach up to 90%. Furthermore, the diffraction efficiency, increases as the refractive index modulation depth increases and decreases as the chirp rate increases. The diffraction spectrum has the characteristics of flat-top band pass. To increase the spatial separation distance, multiple schemes of CVBGs in parallel combination are designed. By combining a self-focusing lens array, the proposed system can realize wavelength division multiplexing with bandwidth less than 0.4nm.
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Qinfeng Xu, Baoxing Xiong, Changwei Guo, Feng Xu, Guiju Zhang, and Kuaisheng Zou "Study on wavelength division multiplexing with chirped volume Bragg gratings", Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 108400J (24 January 2019); https://doi.org/10.1117/12.2507593
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KEYWORDS
Diffraction
Wavelength division multiplexing
Diffraction gratings
Volume Bragg gratings
Refractive index
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