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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 27, Iss. 5 — Mar. 1, 2002
  • pp: 303–305

Experimental modulation bandwidth beyond the relaxation oscillation frequency in a monolithic twin-ridge laterally coupled diode laser based on lateral mode locking

H. Lamela, B. Roycroft, P. Acedo, R. Santos, and G. Carpintero  »View Author Affiliations


Optics Letters, Vol. 27, Issue 5, pp. 303-305 (2002)
http://dx.doi.org/10.1364/OL.27.000303


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Abstract

Monolithic twin-ridge laterally coupled diode lasers emitting at 1.3µm are presented that have a small-signal modulation bandwidth beyond the relaxation oscillation frequency of a single ridge. Spectra and spectrally resolved far fields are presented for three bias conditions: only one ridge lasing, both ridges lasing just above threshold, and both ridges lasing at biases well above threshold. In the first two cases the spectrum has single-peaked longitudinal modes, whereas the third cases shows splitting to in-phase and out-of-phase modes. The splitting frequency of the optical spectrum is measured to be 7.7 GHz. Small-signal modulation measurements reveal a strong resonance at 7.7 GHz, demonstrating an effect of lateral mode locking. As a result of this effect, the twin-ridge laser can be made to have a -3-dB bandwidth beyond that associated with its relaxation oscillation frequency.

© 2002 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3290) Lasers and laser optics : Laser arrays
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.7090) Lasers and laser optics : Ultrafast lasers

Citation
H. Lamela, B. Roycroft, P. Acedo, R. Santos, and G. Carpintero, "Experimental modulation bandwidth beyond the relaxation oscillation frequency in a monolithic twin-ridge laterally coupled diode laser based on lateral mode locking," Opt. Lett. 27, 303-305 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-5-303

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