Batch  imprinting of DFB fiber lasers for underwater sensing using excimer KrF laser

Alexei Tikhomirov; Alexander Kolodin; Joanne Harrison; Scott Foster

doi:10.1117/12.2554938

1 April 2020 Batch imprinting of DFB fiber lasers for underwater sensing using excimer KrF laser

Alexei Tikhomirov, Alexander Kolodin, Joanne Harrison, Scott Foster

Author Affiliations +

Proceedings Volume 11367, Photosensitive Materials and their Applications; 113671C (2020) https://doi.org/10.1117/12.2554938
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

We demonstrate a grating recording method using an excimer KrF UV laser for batch imprinting of distributed feedback (DFB) fiber lasers (FL) with complex profiles and high grating strength (up to K<4 cm^-1) for underwater acoustic sensing applications. The specially developed FPGA-controlled stepping algorithm allows for the recording of long (up to 52mm) DFB laser structures with step error compensation, chirping and apodisation for the FL side-lobe suppression at arbitrarily high exposures. Batch recording involving simultaneous exposure of a number of fibers placed in the recording zone, to achieve time and cost reduction during manufacturing is demonstrated. A number of different gratings in a passive fiber as well as DFB FL in Er-doped active fiber have been fabricated and studied. Further ways to improve the recording process are proposed.

Conference Presentation

Citation Download Citation

Alexei Tikhomirov, Alexander Kolodin, Joanne Harrison, and Scott Foster "Batch imprinting of DFB fiber lasers for underwater sensing using excimer KrF laser", Proc. SPIE 11367, Photosensitive Materials and their Applications, 113671C (1 April 2020); https://doi.org/10.1117/12.2554938

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