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16 March 2018 Moiré apodized reflective volume Bragg grating
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Volume Bragg grating (VBG) with refractive index modulation (RIM) apodized with sinusoidal semiperiod profile is studied theoretically and experimentally. An apodized VBG of this type was fabricated with a sequential recording of two VBGs with slightly different resonant Bragg wavelengths in the same glass wafer. As a result, a moiré pattern was produced with a constant average refractive index and a slow sinusoidal envelope of RIM. Modeling showed that an apodized VBG with a sinusoidal semiperiod has provided a suppression of the sidelobes in the reflection spectrum. The experimental measurements are in good agreement with the theoretical predictions. This type of VBG is suitable for high-resolution spectroscopy applications due to a significant reduction of sidelobes.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Sergiy Mokhov, Daniel Ott, Vadim Smirnov, Ivan Divliansky, Boris Zeldovich, and Leonid Glebov "Moiré apodized reflective volume Bragg grating," Optical Engineering 57(3), 037106 (16 March 2018).
Received: 30 October 2017; Accepted: 14 February 2018; Published: 16 March 2018

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