Abstract

When femtosecond laser pulses interfere with chirped femtosecond laser pulses in As_(2)S_(3) fiber, a chirped fiber grating is formed. An analytical expression is given to describe the chirped grating, and its Bragg reflectivity is calculated. Because of the high photosensitive effect of As_(2)S_(3) material, the chirped fiber grating has a wide Bragg reflective spectrum and high reflectivity by choosing proper parameters. This indicates that the chirped fiber grating can be used as a stretcher in the femtosecond chirped pulse amplification (CPA) system.

© 2005 Chinese Optics Letters

As₂S₃ photosensitivity by two-photon absorption: holographic gratings and self-written channel waveguides

Chiara Meneghini and Alain Villeneuve
J. Opt. Soc. Am. B 15(12) 2946-2950 (1998)

Two-photon absorption effects on Raman gain in single mode As2Se3 chalcogenide glass fiber

A. Tuniz, G. Brawley, D. J. Moss, and B. J. Eggleton
Opt. Express 16(22) 18524-18534 (2008)

Efficient inscription of Bragg gratings in As₂S₃ fibers using near bandgap light

L. E. Zou, I. V. Kabakova, E. C. Mägi, E. Li, C. Florea, I. D. Aggarwal, B. Shaw, J. S. Sanghera, and B. J. Eggleton
Opt. Lett. 38(19) 3850-3853 (2013)

Photoinduced Bragg gratings in As₂S₃ optical fibers

K. Tanaka, N. Toyosawa, and H. Hisakuni
Opt. Lett. 20(19) 1976-1978 (1995)

Writing of Bragg gratings through the polymer jacket of low-loss As₂S₃fibers using femtosecond pulses at 800 nm

M. Bernier, M. El-Amraoui, J. F. Couillard, Y. Messaddeq, and R. Vallée
Opt. Lett. 37(18) 3900-3902 (2012)