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11 March 2020 Nonlinearly chirped fiber Bragg gratings by selective refractive index tuning using femtosecond laser pulses (Conference Presentation)
Timothy Oshiobughie Imogore, Ria G. Krämer, Maximilian Heck, Thorsten A. Goebel, Daniel Richter, Stefan Nolte
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Proceedings Volume 11261, Components and Packaging for Laser Systems VI; 112610S (2020) https://doi.org/10.1117/12.2544674
Event: SPIE LASE, 2020, San Francisco, California, United States
Abstract
We present a novel approach for the inscription of nonlinearly chirped fiber Bragg gratings (N-CFBGs) using femtosecond laser pulses. This approach allows the efficient fabrication of N-CFBGs by partially tuning the average refractive index of an already inscribed linearly CFBG. No complex phase mask designs or further modifications of the inscription setup are necessary. This approach involves selectively modifying the average refractive index perturbation and the index offset of smaller sections of the grating and has the advantage of reproducibility and flexibility. It paves the way for N-CFBGs with tailored dispersion profiles used in fiber based CPA systems.
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Timothy Oshiobughie Imogore, Ria G. Krämer, Maximilian Heck, Thorsten A. Goebel, Daniel Richter, and Stefan Nolte "Nonlinearly chirped fiber Bragg gratings by selective refractive index tuning using femtosecond laser pulses (Conference Presentation)", Proc. SPIE 11261, Components and Packaging for Laser Systems VI, 112610S (11 March 2020); https://doi.org/10.1117/12.2544674
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KEYWORDS
Femtosecond phenomena
Fiber Bragg gratings
Refractive index
Fabrication
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