Diffractive properties of DMD gratings and its new application in tunable fiber lasers
Document Type
Journal Article
Keywords
Digital micromirror device, Grating, Multiple pixels interference, Nonlinear optics, Single pixel factor, Tunable fiber laserConstraint conditions, Diffraction orders, Diffraction property, Diffractive properties, Digital micro-mirror device, Fast switching, Four-order, Grating, High precision, Incident angles, Intensity distribution, Laser systems, Light intensity, Liquid crystal spatial light modulators, New applications, Pixel spacing, Polarization-independent, Single pixel, Theoretical result, Tunable fiber lasers, Two-dimension, Diffraction, Diffraction gratings, Digital devices, Fiber lasers, Nonlinear optics, Pixels
Faculty
Faculty of Computing, Health and Science
School
Electron Science Research Institute
RAS ID
15077
Abstract
Compared with widely-used liquid crystal spatial light modulators, digital micromirror devices (DMDs) have advantages in fast switching speed, high precision display, polarization-independent, high diffraction efficiency, and broadband capability. Therefore, we attempt to apply DMDs as wavelength selectors to tunable fiber lasers and analyze the dependence of diffraction properties of the two-dimension DMD grating on the incident angle, pixel spacing, etc. The diffraction orders and intensity distribution of DMDs in 0.7″ and 0.55″ sizes with different pixel spacings are discussed in detail. The theoretical results show that under the experimental constraint condition, a 0.7″ DMD allows four orders interference irradiance maxima. However, the light intensity is relatively weak due to the condition of far away from "blazed" grating. For a 0.55″ DMD, most of the diffracted radiation is concentrated in one order due to the approximate "blazed" condition. So, a 0.55″ DMD grating as a wavelength tuner is a better choice for the stability of laser systems.
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Comments
Chen, X., Yan, B., Song, F., Wang, Y., Xiao, F. , & Alameh, K. (2012). Diffractive properties of DMD gratings and its new application in tunable fiber lasers . Acta Optica Sinica, 32(7), Article number0705003. Available here