Pantouvaki, M and Renaud, CC and Cannard, P and Robertson, MJ and Gwilliam, R and Seeds, AJ (2007) Fast tuneable InGaAsP DBR laser using quantum-confined stark-effect-induced refractive index change. IEEE Journal of Selected Topics in Quantum Electronics , 13 (5) 1112 - 1121. 10.1109/JSTQE.2007.906046.
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We report a monolithically integrated InGaAsP DBR ridge waveguide laser that uses the quantum-confined Stark effect (QCSE) to achieve fast tuning response. The laser incorporates three sections: a forward-biased gain section, a reverse-biased phase section, and a reverse-biased DBR tuning section. The laser behavior is modeled using transmission matrix equations and tuning over similar to 8 nm is predicted. Devices were fabricated using post-growth shallow ion implantation to reduce the loss in the phase and DBR sections by quantum well intermixing. The lasing wavelength was measured while varying the reverse bias of the phase and DBR sections in the range 0 V to < - 2.5 V. Timing was noncontinuous over a similar to 7-nm-wavelength range, with a side-mode suppression ratio of similar to 20 dB. Coupled cavity effects due to the fabrication method used introduced discontinuities in tuning. The frequency modulation (FM) response was measured to be uniform within 2 dB over the frequency range 10 MHz to 10 GHz, indicating that tuning times of 100 ps are possible.
|Title:||Fast tuneable InGaAsP DBR laser using quantum-confined stark-effect-induced refractive index change|
|Open access status:||An open access version is available from UCL Discovery|
|Additional information:||© 2007 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.|
|Keywords:||integrated optics, ion implantation, laser tuning, quantum-confined Stark effect (QCSE), quantum well intermixing (QWI), timeable semiconductor lasers, FREQUENCY-MODULATION RESPONSE, WELL STRUCTURES, TUNING RANGE, ION-IMPLANTATION, PERFORMANCE, ELECTROABSORPTION, TRANSMITTER, GENERATION, REFLECTOR, DIFFUSION|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering|
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