Dynamics of semiconductor laser arrays.
dc.contributor.author | Wang, Shawe-Shiuan | en_US |
dc.contributor.advisor | Winful, Herbert G. | en_US |
dc.date.accessioned | 2014-02-24T16:29:10Z | |
dc.date.available | 2014-02-24T16:29:10Z | |
dc.date.issued | 1991 | en_US |
dc.identifier.other | (UMI)AAI9135716 | en_US |
dc.identifier.uri | http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:9135716 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/105623 | |
dc.description.abstract | This thesis presents a theoretical and experimental study of semiconductor laser arrays. A time-dependent coupled-mode model is developed for analyzing the well-confined evanescently coupled index-guided arrays. The stability conditions for twin-stripe devices is derived and interpreted physically. With this model, both twin-stripe and multi-stripe devices are simulated. From these simulations, the stable outputs with lateral in-phase and out-of-phase modes are observed. Through changing the coupling coefficient, periodic and irregular outputs could also be found. These simulation results agree the stability conditions. In order to analyze most weak-guiding structures, a continuum model developed from the the beam propagation method based on the fast Fourier transform is employed. Both gain-guided and index-guided twin-stripe arrays are simulated utilizing this model. In the case of the index-guided arrays, both unstable and stable (out-of-phase) outputs are observed. The temporal energy exchange between the two stripes were noted. For the gain-guided case, stable, synchronuous Q-switched spikings, as well as irregular spiking, are observed by varying the spacing between the two laser stripes. The spatio-temporal behavior of the outputs of twin-stripe and 8-stripe devices are measured with a streak camera under continuous wave and pulsed operations. The synchronuous spiking oscillations from each stripe are noted in both arrays. By using a spectrometer, we found that the twin-stripe gain-guided device with low pump current, was single-lateral mode and single mode, while the 8-stripe CSP array displays multiple modes laterally and longitudinally. The modulation behavior of various laser arrays are measured by using a spectrum analyzer. It is found that the laser arrays are still modulable even if their outputs can still be unstable under cw operation. | en_US |
dc.format.extent | 136 p. | en_US |
dc.subject | Engineering, Electronics and Electrical | en_US |
dc.subject | Physics, Optics | en_US |
dc.title | Dynamics of semiconductor laser arrays. | en_US |
dc.type | Thesis | en_US |
dc.description.thesisdegreename | PhD | en_US |
dc.description.thesisdegreediscipline | Electrical Engineering | en_US |
dc.description.thesisdegreegrantor | University of Michigan, Horace H. Rackham School of Graduate Studies | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/105623/1/9135716.pdf | |
dc.description.filedescription | Description of 9135716.pdf : Restricted to UM users only. | en_US |
dc.owningcollname | Dissertations and Theses (Ph.D. and Master's) |
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