Recent advances in photodetectors with distributed optical amplification
نویسندگان
چکیده
For the past few years, we have been researching a novel type of photodetector featuring distributed optical amplification. We call these devices traveling-wave amplifier-photodetectors, or TAP detectors. The distributed combination of gain and absorption seeks a larger efficiency while keeping a low optical power, thus avoiding saturation. In this paper, we present experimental results both of GaAsand InP-based TAP detectors, showing in the former case an external quantum efficiency larger than 200%, and larger than 100% in the latter. The performance limitation is shown to be related to the competition between the optical input signal and the amplified spontaneous emission (ASE) generated in the amplifier.
منابع مشابه
Modeling of traveling-wave amplification photodetectors (TAP detectors)
High speed, high efficiency, low noise and high saturation power are the characteristics desired for detectors in high bit-rate long-haul optical communication systems. We present the modeling of Traveling-wave Amplification Photodetectors (TAP detectors). These novel monolithic devices combine optical gain and absorption in a distributed fashion along a traveling-wave structure, providing high...
متن کاملRecent Advances and Future Prospects in High-Speed and High- Saturation-Current Photodetectors
High power photodetectors have a made remarkable progress in performance over the last few years with prospective application in high-bit-rate digital receivers with reduced complexity, CATV, analog-to-digital converter, high power RF distribution and optoelectronic generation of high power microwaves and millimeter-waves in RF photonic systems. An in depth understanding of the failure mechanis...
متن کاملLong Distance Signal Transmission in CATV Network Using Distributed Raman Amplification
Distributed Raman amplification based long distance fiber optic transmission systems have been widely deployed for telecommunication applications. Several scattering effects and multiple reflections in a field-installed fibers posed stringent conditions for analog transmission for conventional CATV applications. However, recent advances in grating technology and the development of high-power di...
متن کاملBreaking the buildup-time limit of sensitivity in avalanche photodiodes by dynamic biasing.
Avalanche photodiodes (APDs) are the preferred photodetectors for direct-detection, high data-rate long-haul optical telecommunications. APDs can detect low-level optical signals due to their internal amplification of the photon-generated electrical current, which is attributable to the avalanche of electron and hole impact ionizations. Despite recent advances in APDs aimed at reducing the aver...
متن کاملVelocity-Matched Distributed Photodetectors and Balanced Photodetectors with p-i-n Photodiodes
We report on the first demonstration of velocity-matched distributed photodetectors and balanced photodetectors with p-i-n photodetectors. Record-high linear dc photocurrent of 45 mA has been achieved without suffering from thermal damage, thanks to the superior power handling capability of p-i-n photodiodes. A novel fiber alignment technique has been developed to achieve high linear photocurre...
متن کامل