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Optics Letters

Optics Letters


  • Vol. 36, Iss. 6 — Mar. 15, 2011
  • pp: 784–786

Efficient and low-threshold Cr 4 + : YAG double-clad crystal fiber laser

Chien-Chih Lai, Chih-Peng Ke, Shih-Kun Liu, Dong-Yo Jheng, Ding-Jie Wang, Ming-Yen Chen, Yu-Shaung Li, Pinghui S. Yeh, and Sheng-Lung Huang  »View Author Affiliations

Optics Letters, Vol. 36, Issue 6, pp. 784-786 (2011)

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A significant advancement of cw lasing in Cr 4 + : Y 3 Al 5 O 12 ( Cr 4 + : YAG ) double-clad crystal fiber grown by the codrawing laser-heated pedestal growth technique was demonstrated at RT. The optical-to-optical slope efficiency of 33.9% is the highest, to the best of our knowledge, among all Cr 4 + : YAG lasers, whether they are in bulk or fiber forms. The low-threshold lasing of 78.2 mW and high efficiency are in good agreement with the simulation. The keys to the high laser efficiency are twofold: one is the improved Cr 4 + emission cross section and fluorescence lifetime due to release of the strain on the distorted Cr 4 + tetrahedron, which also mitigates photobleaching in Cr 4 + : YAG ; the other is the improved core uniformity at long fiber lengths. In addition, because of the low threshold, the impact of excited state absorption of the pump light is significantly reduced. The effects of crystal-orientation, self-selected, and pump-dependent linear polarization states were also addressed.

© 2011 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(160.6990) Materials : Transition-metal-doped materials
(230.5440) Optical devices : Polarization-selective devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: December 15, 2010
Revised Manuscript: January 23, 2011
Manuscript Accepted: January 29, 2011
Published: March 4, 2011

Virtual Issues
Vol. 6, Iss. 4 Virtual Journal for Biomedical Optics

Chien-Chih Lai, Chih-Peng Ke, Shih-Kun Liu, Dong-Yo Jheng, Ding-Jie Wang, Ming-Yen Chen, Yu-Shaung Li, Pinghui S. Yeh, and Sheng-Lung Huang, "Efficient and low-threshold Cr4+:YAGdouble-clad crystal fiber laser," Opt. Lett. 36, 784-786 (2011)

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