An excess noise measurement system for weak responsivity avalanche photodiodes
An excess noise measurement system for weak responsivity avalanche photodiodes
复制标题
弱响应度雪崩光电二极管的过量噪声测量系统
DOI:
10.1088/1361-6501/aabc8b
复制
发表时间:
2018
影响因子:
2.4
通讯作者:
Qiao L
中科院分区:
文献类型:
--
作者:
Qiao L
A system for measuring, with reduced photocurrent, the excess noise associated with the gain in avalanche photodiodes (APDs), using a transimpedance amplifier front-end and based on phase-sensitive detection is described. The system can reliably measure the excess noise power of devices, even when the un-multiplied photocurrent is low (~ 10 nA). This is more than one order of magnitude better than previously reported systems and represents a significantly better noise signal to noise ratio. This improvement in performance has been achieved by increasing the value of the feedback resistor and reducing the op-amp bandwidth. The ability to characterise APD performance with such low photocurrents enables the use of low power light sources such as light emitting diode rather than lasers to investigate the APD noise performance.
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1973
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2012
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