Amplified spontaneous emission-induced thermal nonlinearities in a mechanically induced long-periodfiber grating

V. P. Sudeep Kumar; B. Unnikrishnan Nair; Vellara Pappukutty Mahadevan Pillai; V. Unnikrishnan Nayar

doi:10.1117/1.2978950

1 September 2008 A dual-wavelength narrow-linewidth laser system, with ultranarrow wavelength spacing, is proposed and demonstrated. The operation principle of the laser system is based on the pump-induced thermal effects of the Er-Yb-doped fiber distributed Bragg reflect

V. P. Sudeep Kumar, B. Unnikrishnan Nair, Vellara Pappukutty Mahadevan Pillai, V. Unnikrishnan Nayar

Author Affiliations +

Optical Engineering, Vol. 47, Issue 9, 094401 (September 2008). https://doi.org/10.1117/1.2978950

Abstract

Using the amplified spontaneous emission (ASE) from an erbium-doped fiber amplifier (EDFA) at zero signal condition, the shifting of resonant wavelengths in a mechanically induced long-period fiber grating (MLPFG), resulting from the intensity induced effects is demonstrated. The theoretical and experimental investigations on the ASE-induced effects in an MLPFG are presented. The developed theory is concise and is useful for differentiating the index changes due to Kerr and other intensity-dependent effects in a long-period fiber grating (LPFG). It is demonstrated that the induced index will be high for the LP₁₁ resonance near the third telecommunication window and is negligible for the LP₁₂ resonance. Because of the increase in microbend loss at each groove of the MLPFG, the thermally induced nonlinear effects lessen at higher values of applied pressures

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

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V. P. Sudeep Kumar, B. Unnikrishnan Nair, Vellara Pappukutty Mahadevan Pillai, and V. Unnikrishnan Nayar "A dual-wavelength narrow-linewidth laser system, with ultranarrow wavelength spacing, is proposed and demonstrated. The operation principle of the laser system is based on the pump-induced thermal effects of the Er-Yb-doped fiber distributed Bragg reflect," Optical Engineering 47(9), 094401 (1 September 2008). https://doi.org/10.1117/1.2978950

Published: 1 September 2008

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