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Continuous wave optical power of 1.32 W and wallplug efficiency over 7.1 % were demonstrated at 300 K for MOCVD-grown quantum cascade lasers emitting at 4.6 μm.
Continuous wave optical power of 1.32 W and wallplug efficiency over 7.1 % were demonstrated at 300 K for MOCVD-grown quantum cascade lasers emitting at 4.6 mum.
We report Buried-heterostructure QCLs of lambda~5mum, grown by MOCVD, with extremely low CW room-temperature threshold-current-density of 0.75kA/cm2. Slope efficiencies of 1079mW/A, output power of 116 mW at 288 K and internal loss of 1.84cm-1 have been achieved.
Room temperature, continuous-wave operation of lambda~8.2 mum quantum cascade lasers grown by MOCVD is reported. The lasers have been processed as double-channel ridge waveguides without the need for buried heterostructures.
A simplified monolithic optical injection locking system using a two section DFB laser is demonstrated. The operating wavelength of the two sections is current tuned to achieve optical injection locking; when locked the modulation bandwidth is increased from 10 GHz to 23 GHz.
Summary form only given. We report an improved predistorter, which cancels fifth-order (IMD5) as well as third-order (IMD3) intermodulation distortion and yields a composite triple beat (CTB) of -60 dBc. The uncorrected composite second-order distortion (CSO) is -61 dBc. The reduction in CTB (17.5 dB) is 6 dB better than the largest previously reported for an electroabsorption modulator. Low distortion...
Summary form only given. We study the effect of a distributed feedback (DFB) structure on the carrier lifetime in a semiconductor laser. In DFB lasers, the spatially inhomogeneous optical intensity along the longitudinal direction of the active region gives rise to spatial hole burning. We show that this inhomogeneous intensity also creates a spatially dependent differential carrier lifetime, and...
Summary form only given. In the quest to improve distributed feedback lasers for telecommunication systems, it is critical to be able to characterize these lasers effectively. In this paper, we use out model for the amplified spontaneous emission from DFB lasers coupled with our model for the material gain of strained quantum well lasers to analyze data measured on a 1.55-/spl mu/m InGaAsP-InGaAsP...
Summary form only given. In conclusion, we have demonstrated the first, to our knowledge, error-free transmission experiments over 102.5 km of standard fiber using a 1.3-/spl mu/m electroabsorption modulated laser (EML) device, Raman optical amplifier, and a moduled HBT receiver at 10 Gbit/s.
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