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Chinese Optics Letters

Chinese Optics Letters


  • Editor: Zhizhan Xu
  • Vol. 11, Iss. 12 — Dec. 1, 2013
  • pp: 121401–121401

Tapered Bragg reflection waveguide edge emitting lasers with near circular twin-beam emission

Ye Yang, Cunzhu Tong, Lijie Wang, Yugang Zeng, Junsheng Cao, Biao Wang, and Lijun Wang  »View Author Affiliations

Chinese Optics Letters, Vol. 11, Issue 12, pp. 121401-121401 (2013)

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An edge emitting laser with two symmetrical near-circular spots located far field (FF) is demonstrated using tapered double-sided Bragg reflection waveguides (BRWs). The BRWs consist of six pairs of top p-type and bottom n-type Al0.1 Ga0.9 As/Al0.3 Ga0.7As Bragg reflectors with a period thickness of 850 nm. The device has a 4o tapered angle configuration and exhibits two stable circular beams with a separation angle of 52o. Typical FF angles of 5.87o and 7.8o in the lateral and vertical directions, respectively, are achieved. The lateral FF angle in the ridged section is independent of the injection current (>0.8 A) because of narrow ridge (~10 \mu m) confinement. By contrast, the FF angle in the tapered section shows an increase rate of 1.2-1.66o/A. The periodic modulation of the lasing wavelength is observed to be sensitive to self-heating effects.

© 2013 Chinese Optics Letters

OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(230.1480) Optical devices : Bragg reflectors
(230.7370) Optical devices : Waveguides
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Lasers and Laser Optics

Ye Yang, Cunzhu Tong, Lijie Wang, Yugang Zeng, Junsheng Cao, Biao Wang, and Lijun Wang, "Tapered Bragg reflection waveguide edge emitting lasers with near circular twin-beam emission," Chin. Opt. Lett. 11, 121401-121401 (2013)

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