OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 11776–11780

Beam quality improvement of laser diode array by using off-axis external cavity

Su Zhouping, Lou Qihong, Dong Jingxing, Zhou Jun, and Wei Runrong  »View Author Affiliations

Optics Express, Vol. 15, Issue 19, pp. 11776-11780 (2007)

View Full Text Article

Enhanced HTML    Acrobat PDF (233 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A novel off-axis external cavity is designed for laser diode array to improve the beam quality. In this external cavity, a circle aperture with variable size is used as a spatial filter. The diameter of aperture is optimized to 1.2mm and the off-axis angle of external cavity is optimized at 2.6 deg. In the optimal case, the beam parameter product (BPP) of laser diode array is reduced to 121 mm.mrad from 1050 mm.mrad with external cavity optical efficiency of 81%.

© 2007 Optical Society of America

OCIS Codes
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3460) Lasers and laser optics : Lasers
(140.3520) Lasers and laser optics : Lasers, injection-locked

ToC Category:
Lasers and Laser Optics

Original Manuscript: June 22, 2007
Revised Manuscript: July 28, 2007
Manuscript Accepted: August 13, 2007
Published: August 31, 2007

Su Zhouping, Lou Qihong, Dong Jingxing, Zhou Jun, and Wei Runrong, "Beam quality improvement of laser diode array by using off-axis external cavity," Opt. Express 15, 11776-11780 (2007)

Sort:  Year  |  Journal  |  Reset  


  1. E. Samsøe and P. E. Andersen, "Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback," Opt. Express 12,609 (2004). [CrossRef] [PubMed]
  2. S. B. Bayrama and T. E. Chupp, "Operation of a single mode external-cavity laser diode array near 780nm," Rev. Sci. Instrum 73, 4169-4171 (2002). [CrossRef]
  3. J. Chen, X. Wu, J. Ge, A. Hermerschmidt, and H. J. Eichler, "Broad-area laser diode with 0.02 nm bandwidth and diffraction limited output due to double external cavity feedback," Appl. Phys. Lett. 85, 525-527 (2004). [CrossRef]
  4. X. Gao, Y. Zheng, H. Kan, and K. Shinoda, "Effective suppression of beam divergence for a high-power laser diode bar by an external-cavity technique," Opt. Lett. 29, 361-363 (2004). [CrossRef] [PubMed]
  5. Y. Zheng and H. Kan, "Effective bandwidth reduction for a high-power laser-diode array by an external-cavity technique," Opt. Lett. 30,2424-2426 (2005). [CrossRef] [PubMed]
  6. W. A. Clarkson and D. C. Hanna, "Two-mirror beam-shaping technique for high-power diode bars," Opt. Lett. 21, 375-377 (1996). [CrossRef] [PubMed]
  7. P. Y. Wang, "Beam-shaping optics deliver high-power beam," Laser Focus World 37, 115-118 (2001)
  8. J.-M. Verdell and R. Freyieee, "A broad-area mode-coupling model for multiple stripe semiconductor lasers," IEEE J. Quantum Electron. 26, 270-279(1990). [CrossRef]
  9. R. M. R. Pillai and E. M. Garmire, "Paraxial-misalignment insensitive external-cavity semiconductor-laser array emitting near-diffraction limited single-lobed beam," IEEE J. Quantum Electron. 32, 996-1008 (1996). [CrossRef]
  10. M. Chi, N.-S. Bøgh, B. Thestrup and P. M. Petersen, "Improvement of the beam quality of a broad-area diode laser using double feedback from two external mirrors," Appl. Phys. Lett. 85, 1107-1109 (2004). [CrossRef]
  11. M. Chi, B. Thestrup, and P. M. Petersen, "Improvement of the beam quality of a 1000 μm wide broad-area diode laser with self-injection phase locking in an external cavity," Proc. SPIE 5336, 33-37 (2004) [CrossRef]
  12. E. Samsøe, P. Malm, P. E. Andersen, P. M. Petersen and S. Andersson-Engels, "Improvement of brightness and output power of high-power laser diodes in the visible spectral region," Opt. Commun. 219, 369-375 (2003). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1. Fig. 2. Fig. 3.
Fig. 4.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited