Abstract

This paper presents a general discussion on the control of widely tunable super structure grating distributed Bragg reflector (SSG-DBR) lasers. A feedback control scheme is presented that ensures frequency stability and accuracy (better than 0.5 GHz), as well as high side mode suppression ratio (>35 dB). The active section voltage is monitored to maintain mode stability and a highly stable Fabry-Perot etalon is used as a reference to lock the laser frequency to a specific ITU channel. It is shown that stability can even be maintained when directly modulating the laser at 1.244 Gb/s. Furthermore,a characterization scheme is demonstrated that uses the voltage monitoring to generate a look-up table of operation points very efficiently and accurately. For all operation points, the frequency accuracy is better than 0.5 GHz and the side mode suppression ratio is above 35 dB.

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References

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  1. K. Kobayashi and I. Mito, "Single frequency and tunable laser diodes", J. Lightwave Technol., vol. 6, pp. 1623-1633, Nov. 1988 .
  2. H. Ishii, F. Kano, Y. Yoshikuni and H. Yasaka, "Mode stabilization method for superstructure-grating DBR lasers", J. Lightwave Technol., vol. 13, pp. 433-442, Mar. 1998 .

J. Lightwave Technol. (2)

K. Kobayashi and I. Mito, "Single frequency and tunable laser diodes", J. Lightwave Technol., vol. 6, pp. 1623-1633, Nov. 1988 .

H. Ishii, F. Kano, Y. Yoshikuni and H. Yasaka, "Mode stabilization method for superstructure-grating DBR lasers", J. Lightwave Technol., vol. 13, pp. 433-442, Mar. 1998 .

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