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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 11 — Jun. 1, 2014
  • pp: 3231–3234

High-brightness single-mode double-tapered laser diodes with laterally coupled high-order surface grating

Lei Liu, Hongwei Qu, Yufei Wang, Yun Liu, Yejin Zhang, and Wanhua Zheng  »View Author Affiliations

Optics Letters, Vol. 39, Issue 11, pp. 3231-3234 (2014)

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Double-tapered laser diodes with 23rd order laterally coupled surface gratings are fabricated at 913 nm. A narrow ridge waveguide restricts the lateral mode number, and tapered waveguides are utilized to enhance the output power. The gratings defined on the sides of ridge waveguide filter not only the longitudinal modes but also the high-order lateral modes. Experimentally, continuous wave power of over 560 mW / facet is achieved. The lateral far-field pattern exhibits a single-lobe profile and narrow divergence, and the lowest divergence angle is only twice the diffraction-limited one. The measured side-mode suppression ratio is about 27 dB. This device has great potential for high-power single-mode near-diffraction-limited laser emission with easy fabrication.

© 2014 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 26, 2014
Manuscript Accepted: April 18, 2014
Published: May 26, 2014

Lei Liu, Hongwei Qu, Yufei Wang, Yun Liu, Yejin Zhang, and Wanhua Zheng, "High-brightness single-mode double-tapered laser diodes with laterally coupled high-order surface grating," Opt. Lett. 39, 3231-3234 (2014)

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