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Proceedings Paper

Experimental investigation of a figure-eight fiber laser with a symmetrical NOLM and highly twisted fiber-in-the-loop
Author(s): Baldemar Ibarra-Escamilla; Olivier Pottiez; Evgeny A. Kuzin; Rubén Grajales-Coutiño; Joseph W. Haus; Roberto Rojas-Laguna
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Paper Abstract

We report experimental results that demonstrate the mode-locking operation of a figure eight fiber laser based on a symmetrical nonlinear optical loop mirror (NOLM) with a twisted low-birefringence fiber in the loop. The mode-locking operation is achieved by nonlinear polarization rotation in the NOLM, where the counterpropagating beams accumulate a differential nonlinear phase shift when they have different polarizations. By adjusting a single quarter wave (QW) retarder in the NOLM it was possible to change the NOLM transmission behavior from a maximum to a minimum at low input power. Self-starting mode-locking operation was found for only specific settings of the QW retarder. The pulse repetition frequency was around 0.8 MHz. The mode-locked laser operated stably for hours and the adjustment procedure was straightforward. We achieved stable generation of picosecond pulses with milliwatts of average output power.

Paper Details

Date Published: 23 February 2007
PDF: 9 pages
Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 645323 (23 February 2007); doi: 10.1117/12.700704
Show Author Affiliations
Baldemar Ibarra-Escamilla, Instituto Nacional de Astrofísica, Optica y Electrónica (Mexico)
Olivier Pottiez, Ctr. de Investigaciones en Optica (Mexico)
Evgeny A. Kuzin, Instituto Nacional de Astrofísica, Optica y Electrónica (Mexico)
Rubén Grajales-Coutiño, Instituto Nacional de Astrofísica, Optica y Electrónica (Mexico)
Joseph W. Haus, Univ. of Dayton (United States)
Roberto Rojas-Laguna, Univ. de Guanajuato (Mexico)


Published in SPIE Proceedings Vol. 6453:
Fiber Lasers IV: Technology, Systems, and Applications
Donald J. Harter; Andreas Tünnermann; Jes Broeng; Clifford Headley, Editor(s)

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