Simulation of single mode optical waveguide and Mach-Zehnder interferometer in deep-ultraviolet band

Ran Song; Lanting Ji; Juan Su; Chi Wu

doi:10.1117/12.2521912

12 March 2019 Simulation of single mode optical waveguide and Mach-Zehnder interferometer in deep-ultraviolet band

Ran Song, Lanting Ji, Juan Su, Chi Wu

Proceedings Volume 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application; 110234G (2019) https://doi.org/10.1117/12.2521912
Event: Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2018, Xi'an, China

Abstract

Deep ultraviolet (deep-UV, 200nm~300nm) spectrum analysis is an important technique in underwater biochemical sensors. For in-situ exploration, integrated optics based wavelength selective light source would have advantages in obtaining high sensitivity spectrum, compactness and low power consumption. The key components used in forming such wavelength selective light source are optical switch and bandpass filters. However, such optical switch and bandpass filter in deep-UV band have rarely been studied, to our best knowledge. In this paper, we proposed and designed a silica-based optical waveguide structure that can achieve single-mode transmission at 210nm-240nm. Furthermore, we designed and simulated a Mach-Zehnder Interferometer (MZI) switch in deep-UV band for in-situ marine chemical sensing application. In our simulation, a rectangular optical waveguide with single-mode operation has been achieved based on phosphorus (P) and boron (B) co-doped Silica core waveguide with 2.9μm in width and 0.35μm in thickness. The refractive index difference between core and cladding layer is Δn=0.003. Based on this waveguide structure, we also designed a Mach-Zenhder interference (MZI) type optical switch with extinction ratio larger than 26dB at deep-UV band.

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Ran Song, Lanting Ji, Juan Su, and Chi Wu "Simulation of single mode optical waveguide and Mach-Zehnder interferometer in deep-ultraviolet band", Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 110234G (12 March 2019); https://doi.org/10.1117/12.2521912

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KEYWORDS

Waveguides

Deep ultraviolet

Refractive index

Switches

Optical switching

Light sources

Mach-Zehnder interferometers

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