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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 11, Iss. 9 — Sep. 1, 2013
  • pp: 091401–

High efficiency beam combination of 4.6-\mu m quantum cascade lasers

Hao Wu, Lijun Wang, Fengqi Liu, Hangyu Peng, Jun Zhang, Cunzhu Tong, Yongqiang Ning, and Lijun Wang  »View Author Affiliations


Chinese Optics Letters, Vol. 11, Issue 9, pp. 091401- (2013)


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Abstract

The quantum cascade laser (QCL), a potential laser source for mid-infrared applications, has all of the advantages of a semiconductor laser, such as small volume and light weight, and is driven by electric power. However, the optical power of a single QCL is limited by serious self-heating effects. Therefore, beam combination technology is essential to achieve higher laser powers. In this letter, we demonstrate a simple beam combination scheme using two QCLs to extend the output peak power of the lasers to 2.3 W. A high beam combination efficiency of 89% and beam quality factor of less than 5 are also achieved.

© 2013 Chinese Optics Letters

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3298) Lasers and laser optics : Laser beam combining
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

Citation
Hao Wu, Lijun Wang, Fengqi Liu, Hangyu Peng, Jun Zhang, Cunzhu Tong, Yongqiang Ning, and Lijun Wang, "High efficiency beam combination of 4.6-\mu m quantum cascade lasers," Chin. Opt. Lett. 11, 091401- (2013)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-11-9-091401


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