Measurement of Modulation frequency Responses of Semiconductor Laser Diodes with a Frequency Sweeper Based on Delayed Self-Heterodyne Technique

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  • 遅延自己ヘテロダインによる周波数スイーパを用いた半導体レーザの変調周波数特性の測定
  • チエン ジコ ヘテロダイン ニヨル シュウハスウ スイーパ オ モチイタ ハン

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Intrinsic modulation frequency responses of semiconductor laser diodes (LD's) are measured by using a novel frequency sweeper as the light source of the active-layer photomixing method. The modulation frequency responses of LD's up to 8GHz are measured avoiding the influences of the parasitic impedances.<br>The frequency sweeper developed here employs only one distributed feedback LD, and is almost insensitive to ambient temperature fluctuations. Moreover, a high speed control of the beat frequency is possible, and the implementation of the lock-in detection is easily done with a suitable modulation pattern.

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