By Topic

Analyses of mode-hopping phenomena in an AlGaAs laser

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Ohtsu, Motoichi ; Tokyo Inst. of Tech., Yokohama, Japan ; Teramachi, Y. ; Otsuka, Y. ; Osaki, A.

Intensity fluctuations of the longitudinal modes of a 0.8 μm AlGaAs laser were precisely measured during the occurrence of hopping between two modes. It was found from this result that mode hopping follows the stochastics of a Poisson process. The frequency of mode hopping was measured as f_{c} = [\exp [-95(I/I_{th} - 1)]] \times 10^{7} (Hz). where I/I_{th} is the injection current normalized to its threshold value. Results of analog computer simulations showed that spontaneous emission worked as a triggering force for mode hopping. Results of the analysis based on the Fokker-Planck equation were compared to the experimental results, from which the root-mean-square value of the fluctuating electric field of spontaneous emission was estimated as 2.3 \times 10^{2} (V/m) \leq\langle \sim{E}_{N} \leq 3.2 \times 10^{2} (V/m). It is concluded that an effective reduction of mode hopping is achieved if the laser is operated at a higher bias or if the coupling constant between the two modes is increased.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:22 ,  Issue: 4 )