| Autor: |
Xu-Yang, WANG, Zeng-Liang, BAI, Peng-Yan, DU, Yong-Min, LI, Kun-Chi, PENG |
| Předmět: |
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| Zdroj: |
Chinese Physics Letters; Dec2012, Vol. 29 Issue 12, p1-4, 4p |
| Abstrakt: |
We present an ultrastable fiber-based time-domain balanced homodyne detector which can be used for precise characterization of pulsed quantum light fields. A variable optical attenuator based on bending the fiber is utilized to compensate for the different quantum efficiencies of the photodiodes precisely, and a common mode rejection ratio of above 76 dB is achieved. The detector has a gain of 3.2 µV per photon and a signal-to-noise ratio above 20 dB. Optical pulses with repetition rates up to 2MHz can be measured with a detection efficiency of 66%. The stability of the detector is analyzed via an Allan variance measurement and the detector exhibits superior stability which enables a 100-s window for measurement without calibration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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