Passively Mode-Locked Pulse Generation at 40 GHz Repetition Rate by Semiconductor Lasers with Distributed Bragg Reflector for Oscillating Mode Control

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概要

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• Passively mode-locked pulse generations at a 40 GHz repetition rate were demonstrated without using any saturable absorbers. In a conventional dispersive Fabry-Perot cavity with the length corresponding to a mode-locking frequency of lower tens GHz, the phase differences between longitudinal modes become large and cause the out-of-phase mode-locking. In the present work, the gain section was restricted to a half-length of the cavity, then the phase differences were suppressed, and mode-locked pulse generations were achieved. A distributed Bragg reflector (DBR) was implemented in the cavity as an oscillating mode selector. The obtained pulses were almost transform-limited. A typical time-bandwidth product of 0.45 was obtained for a DBR length of 291 μm. By varying the DBR current, the center wavelength of mode-locked pulses was changed over 5 nm. Time-bandwidth products for pulses generated from lasers with various coupling lengths of DBR are also investigated experimentally.

• INSTITUTE OF PURE AND APPLIED PHYSICSの論文
• 2003-04-15

著者

• Nomura Yoshinori

  Advanced Technology R&d Center Mitsubishi Electric Corporation

• Nishimura Tetsuya

  Advanced Technology R&d Center Mitsubishi Electric Corporation

• Nomura Yoshinori

  Advanced Technology R&D Center, Mitsubishi Electric Corporation, 8-1-1, Tsukaguchi-Honmachi, Amagasaki, Hyogo 661-8661, Japan

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• Passively Mode-Locked Pulse Generation at 40 GHz Repetition Rate by Semiconductor Lasers with Distributed Bragg Reflector for Oscillating Mode Control

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