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The basic configuration and characteristics of an actively mode-locked semiconductor laser integrated with an electroabsorption optical modulator are described theoretically and experimentally. With regard to 1.55-µm 40-GHz semiconductor mode-locked lasers integrated with distributed Bragg reflectors with different bandwidths, the results of numerical analysis and experimental evaluations are described. By means of increasing the bandwidth of the distributed Bragg reflector, the optical spectrum is expanded and short pulses with a pulse width of 1.6 ps after linear compression by anomalous dispersion are generated. © 2005 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 88(9): 1–9, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.20193 [ABSTRACT FROM AUTHOR]

This letter demonstrates the use of time-resolved optical-gating based on dispersive propagation to characterize a semiconductor mode-locked laser emitting picosecond pulses at a wavelength of 1.5 μm. DP-TROG is a new noninterferometric method for characterizing ultra-short optical pulses in amplitude and phase without the need for a short optical gating pulse. We describe and give recommendations for the reconstruction of the pulse properties from the set of measured autocorrelation traces and the intensity spectrum [ABSTRACT FROM PUBLISHER]