Switchable and tuneable multi-wavelength Er-doped fibre ring laser using Sagnac filters

被引：19
作者：
Gonzalez-Garcia, A. [1 ]
Pottiez, O. [1 ]
Grajales-Coutino, R. [1 ]
Ibarra-Escamilla, B. [2 ]
Kuzin, E. A. [2 ]
机构：
[1] CIO, Leon 37150, Gto, Spain
[2] INAOE, Dept Opt, Puebla 72000, Pue, Mexico
来源：
LASER PHYSICS | 2010年 / 20卷 / 03期
关键词：
LOOP;
D O I：
10.1134/S1054660X1005004X
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate experimentally a simple configuration to perform wavelength-tuning and multi-wavelength operation in a fibre ring laser that is composed of an Erbium-doped fibre and includes a fibre-optic Sagnac interferometer as a spectral filter. We consider three different Sagnac filters including a 3 dB coupler, two wave retarders (WRs) and respectively 7 cm, 1 and 7 m of high birefringence fibre. The transmission spectrum of each filter is sinusoidal with a 70, 6, and 0.85 nm period, and its maxima can be shifted over one period by adjusting the angle of the retarders in the loop. By adjusting the WRs included in the filter and in the laser ring, tuneable single wavelength and several two- or three-wavelength lasing regimes were observed. In particular, fine adjustments of the WRs allow observing two- and three- wavelength operation with wavelength separations well below the homogeneous bandwidth of the gain medium. The stability of these modes of operation however strongly depends on environmental conditions at room temperature.
引用
收藏
页码：720 / 725
页数：6
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