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3 June 2005 FM response of a tunable laser incorporating thermal effects
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Widely tunable laser diodes are attractive devices for the next generation wavelength-division-multiplexing (WDM) systems, as they have potential to increase the capacity and the flexibility of the networks. Multi-section tunable laser wavelength switching dynamics, are determined by carrier density and temperature effects. After fast wavelength switching has taken place, a thermal transient induced by the tuning current(s) causes a slow wavelength drift towards a steady state value. Thermal effects on the frequency shift keying (FSK) modulation and wavelength switching dynamics are investigated for a GCSR laser, using the phase section. Thermal effects on wavelength switching dynamics of the device are measured by a time-resolved spectral (TRS) technique, based on a scanning Fabry-Perot Interferometer (FPI). The experimental setup has the ability to measure thermal transients at an increased temporal resolution, over previously reported measurements. A model of the FM response has been developed, which is in close agreement with experimental results.
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Gavin Mulvihill and Ronan O'Dowd "FM response of a tunable laser incorporating thermal effects", Proc. SPIE 5825, Opto-Ireland 2005: Optoelectronics, Photonic Devices, and Optical Networks, (3 June 2005);

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