Abstract

A pair of reflection peaks/transmission dips, at twice the Bragg wavelength, were observed in spectra of a Type I fiber Bragg grating written with the standard phase mask technique. The occurrence of two peaks/dips, rather than one, is attributed to the interleaved refractive index modulations along the fiber core, with the periodicity of the phase mask that has been observed previously in images of gratings that cause destructive interference in a reflected wave at the Bragg condition owing to the π phase difference between the grating phases. Thus the standard phase mask technique produced an alternative type of π-phase-shifted grating at twice the design Bragg wavelength.

© 2009 Optical Society of America

High-temperature stable π-phase-shifted fiber Bragg gratings inscribed using infrared femtosecond pulses and a phase mask

Cyril Hnatovsky, Dan Grobnic, and Stephen J. Mihailov
Opt. Express 26(18) 23550-23564 (2018)

Novel fabrication technique for phase-shifted fiber Bragg gratings using a variable-velocity scanning beam and a shielded phase mask

Jiangtao Zhou, Kuikui Guo, Jun He, Maoxiang Hou, Zhe Zhang, Changrui Liao, Ying Wang, Gaixia Xu, and Yiping Wang
Opt. Express 26(10) 13311-13321 (2018)

Variations of the growth of harmonic reflections in fiber Bragg gratings fabricated using phase masks

Claire M. Rollinson, Scott A. Wade, Betty P. Kouskousis, Daniel J. Kitcher, Greg W. Baxter, and Stephen F. Collins
J. Opt. Soc. Am. A 29(7) 1259-1268 (2012)

Effect of phase mask alignment on fiber Bragg grating spectra at harmonics of the Bragg wavelength

Scott A. Wade, William G. A. Brown, Harpreet K. Bal, Fotios Sidiroglou, Greg W. Baxter, and Stephen F. Collins
J. Opt. Soc. Am. A 29(8) 1597-1605 (2012)

Numerical investigation on the effects of fabrication conditions on fiber Bragg grating spectra using the phase mask technique

Betty P. Kouskousis, Daniel J. Kitcher, Stephen F. Collins, and Greg W. Baxter
Appl. Opt. 52(14) 3338-3344 (2013)