30 April 1999 Waveguide heterojunction phototransistors for the analog fiber optic link and signal processing applications
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Abstract
Waveguide npin heterojunction phototransistors (HPTs) are investigated for analog fiber-optic link applications. The device is fabricated on a semi-insulating InP substrate with an integrated CPW transmission line. At low optical power, an incremental DC responsivity of approximately 16 A/W is observed at 1.3 micrometers wavelength. It is demonstrated that the HPT responsivity at RF frequencies can be increased through a second optical beam. Signal mixing experiment using two RF-modulated optical beams shows that the waveguide npin HPT can be used as an effective integrated photodetector/mixer for RF signal up- and down-conversion.
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Dong-Soo Shin, Hao Jiang, Chen Kuo Sun, Wei-Xi Chen, J. T. Zhu, Stephen A. Pappert, Paul K. L. Yu, "Waveguide heterojunction phototransistors for the analog fiber optic link and signal processing applications", Proc. SPIE 3631, Optoelectronic Integrated Circuits and Packaging III, (30 April 1999); doi: 10.1117/12.348301; https://doi.org/10.1117/12.348301
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KEYWORDS
Waveguides

Analog electronics

Fiber optics

Heterojunctions

Phototransistors

Modulation

Signal detection

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