Twin Beam Laser Diode for Optical Disk Memory

R. Hattori; T. Yagi; K. Yamashita; H. Kagawa; M. Ishii; S. Takamiya; S. Mitsui

doi:10.1117/12.939728

20 April 1987 Twin Beam Laser Diode for Optical Disk Memory

R. Hattori, T. Yagi, K. Yamashita, H. Kagawa, M. Ishii, S. Takamiya, S. Mitsui

Proceedings Volume 0740, Laser Diode Optics; (1987) https://doi.org/10.1117/12.939728
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

We report here a novel new twin beam laser diode consisting of a high power laser and a low noise laser in one chip, for writing and reading an optical disk, respectively. The maximum light output of the high power laser is typically 45mW CW, and the signal to noise ratio of low noise laser is higher than 90dB under such conditions that the operating power is 3mW CW, the frequency is 20KHz, the band width is 300Hz and the range of optical feedback ratio is 0.1-5.0%. Moreover, the up-side-down mounted device shows a good performance for the thermal cross-talk between high power and low noise laser.

Citation Download Citation

R. Hattori, T. Yagi, K. Yamashita, H. Kagawa, M. Ishii, S. Takamiya, and S. Mitsui "Twin Beam Laser Diode for Optical Disk Memory", Proc. SPIE 0740, Laser Diode Optics, (20 April 1987); https://doi.org/10.1117/12.939728

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