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Optical pulse generation using fabry-Pe/spl acute/rot lasers under continuous-wave operation | IEEE Journals & Magazine | IEEE Xplore

Optical pulse generation using fabry-Pe/spl acute/rot lasers under continuous-wave operation


Abstract:

Optical pulse generation at 100 GHz using a 1.5-μm Fabry-Pe/spl acute/rot laser is experimentally demonstrated under continuous-wave operation. Although the output from t...Show More

Abstract:

Optical pulse generation at 100 GHz using a 1.5-μm Fabry-Pe/spl acute/rot laser is experimentally demonstrated under continuous-wave operation. Although the output from the laser is almost constant, subpicosecond pulses at 100 GHz are obtained after propagation through a single-mode fiber with an adequate anomalous dispersion. The measured radio frequency spectrum confirms that the multiple longitudinal modes of the Fabry-Pe/spl acute/rot laser are passively mode locked. Mode-locking instabilities appearing as frequency jumps at different currents are observed.
Published in: IEEE Journal of Selected Topics in Quantum Electronics ( Volume: 9, Issue: 5, Sept.-Oct. 2003)
Page(s): 1288 - 1293
Date of Publication: 06 February 2004

ISSN Information:


I. Introduction

Semiconductor lasers with Fabry–Pérot (FP) cavities show multiple longitudinal modes, and the multimode nature of FP lasers has extensively been studied. The main-mode power increases as the injection current to the laser increases. However, the side-mode power saturates in the above-threshold regime because the carrier density is cramped at the threshold. According to conventional semiconductor laser theory [1], therefore, the side-mode suppression ratio (SMSR) increases as the injection current increases. Experimentally, however, a degradation in the SMSR and spectral broadening are observed in high-injection regimes. In particular, long-wavelength FP lasers show a broader spectrum compared with short-wavelength FP lasers. Anomalous behaviors of longitudinal modes such as spectral asymmetries and wavelength shifts have been reported [2]–[4]. Experimental setup. All measurements are done after coupling to an SMF through an optical isolator with an isolation of 60 dB.

References

References is not available for this document.