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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 16, Iss. 3 — Mar. 1, 1998
  • pp: 433–

Mode Stabilization Method for Superstructure-Grating DBR Lasers

Hiroyuki Ishii, Fumiyoshi Kano, Yuzo Yoshikuni, and Hiroshi Yasaka

Journal of Lightwave Technology, Vol. 16, Issue 3, pp. 433- (1998)

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A wavelength stabilization method for widely tunable superstructure-grating (SSG) distributed Bragg reflector (DBR) laser is described. The output characteristics under tuning are studied theoretically and experimentally. It is found that peak reflectivity states, in which the lasing mode is just aligned with the reflection peaks of both DBR's, are obtained at saddle points in the output characteristics while changing the two SSG-DBR currents. Based on these results, a method for the Bragg frequency control of the two SSG-DBR's is proposed. The feedback control circuit keeps the lasing mode at a peak reflectivity state, and it suppresses mode hopping. Additionally, the oscillation mode is locked to arbitrary reference wavelengths of an optical filter. Stabilization at 200 GHz(1.6nm)-spaced 16 wavelengths was achieved within the wide tuning range of the SSG-DBR laser. Control was maintained under a laser temperature variation of {\pm}5C as a result of the Bragg frequency control of the two DBR's.


Hiroyuki Ishii, Fumiyoshi Kano, Yuzo Yoshikuni, and Hiroshi Yasaka, "Mode Stabilization Method for Superstructure-Grating DBR Lasers," J. Lightwave Technol. 16, 433- (1998)

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