Femtosecond-written long-period gratings in fluoride fibers

Heck M, Nolte S, Tuennermann A, Vallee R, Bernier M (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Optics Letters Optical Society of America

Book Volume: 43

Pages Range: 1994-1997

Journal Issue: 9

DOI: 10.1364/OL.43.001994

Abstract

Long-period gratings induced in fluoride glass fibers using femtosecond laser pulses at 800 nm are, to the best of our knowledge, demonstrated for the first time. By means of tightly confined ultrashort laser pulses, smooth periodic lines of refractive index changes are induced along the fiber core. Taking advantage of heat accumulation effects in the focal volume, attenuation peaks down to −24 dB, with sharp and predictable spectral resonances, were obtained. Thermal annealing of the grating up to 250°C yielded a significant reduction of the induced refractive index change. The gratings could find applications in various integrated mid-infrared optical devices, such as optical notch filters in fiber amplifiers.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Université Laval (UL) CA Canada (CA)

How to cite

APA:

Heck, M., Nolte, S., Tuennermann, A., Vallee, R., & Bernier, M. (2018). Femtosecond-written long-period gratings in fluoride fibers. Optics Letters, 43(9), 1994-1997. https://doi.org/10.1364/OL.43.001994

MLA:

Heck, Maximilian, et al. "Femtosecond-written long-period gratings in fluoride fibers." Optics Letters 43.9 (2018): 1994-1997.

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