Computer Generated Hologram for Beam Control of LCOS based Wavelength Selective Switch

Title & Authors
Computer Generated Hologram for Beam Control of LCOS based Wavelength Selective Switch
Lee, Yong-Min; Han, Chang Ho;

Abstract
This paper presents the design of a computer-generated hologram for beam control of an LCOS-based wavelength selective switch, which is the core technology for next-generation ROADM. By introducing a computer-generated hologram instead of general grating patterns to control the LCOS device, we contribute to building a more efficient wavelength selective switch. With the use of phase modulation properties of LCOS devices, we designed the hologram for five-port output and a 40-channel wavelength selective switch. We applied a multi-level phase modulation technique with the Gerchberg-Saxton algorithm to produce the hologram, which is easily scalable to any different type of wavelength selective switch. With an experimental setup, we verified the usability of the hologram designed for five-port output. We also suggest a hologram design technique for beam control of a 40-channel wavelength selective switch.
Keywords
LCOS;Wavelength Selective Switch;Computer Generated Hologram;ROADM;Optical Communication;
Language
Korean
Cited by
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