Broadband photoelectric detector responsivity tester and testing method thereof
A technology of photodetectors and testing methods, applied in the direction of instruments, etc., can solve the problem that the frequency sweep method cannot get rid of the extra calibration of electro-optic conversion devices, cannot meet the responsivity measurement of ultra-bandwidth photodetectors, and the signal ratio and dynamic range of the intensity-to-noise method are small etc. to achieve the effect of realizing self-referencing measurement, ensuring self-referencing measurement, improving system signal-to-noise ratio and dynamic range
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[0047] Example one
[0048] The optical frequency comb output module in this embodiment uses a mode-locked laser with a repetition frequency of 10 GHz, and the dual-drive intensity modulation module uses a dual-drive Mach-Zehnder modulator. Set the signal source 1 to output a sinusoidal microwave signal at a frequency of 3.01 GHz. The frequency of the sinusoidal microwave signal output by the source 2 is 3GHz. The optical signal output by the dual-drive intensity modulation module is photoelectrically converted in the photoelectric detector to be measured to form an electrical signal, which is analyzed and measured by the spectrum analysis and data processing module.
[0049] When k=0, the measuring frequency is 6.01GHz(f 1 +f 2 ), 0.01GHz(f 1 -f 2 ), respectively A(f 1 +f 2 )=0.0041V, A(f 1 -f 2 )=0.0038V, then according to formula (4), the photoelectric detector under test can be obtained at a frequency of 6.01GHz (f 1 +f 2 ) And 0.01GHz (f 1 -f 2 ) Ratio of responsivity
[0050] ...
Example Embodiment
[0052] Example two
[0053] The optical frequency comb output module in this embodiment uses a mode-locked laser with a repetition frequency of 10 GHz, and the dual-drive intensity modulation module uses a dual-drive Mach-Zehnder modulator. Set the signal source 1 to output a sinusoidal microwave signal at 3.81 GHz. The frequency of the sinusoidal microwave signal output by the source 2 is 3.8GHz. The optical signal output by the dual-drive intensity modulation module is photoelectrically converted in the photoelectric detector to be tested to form an electrical signal, which is analyzed and measured by the spectrum analysis and data processing module.
[0054] When k=1, the measurement frequency is 17.61GHz(f m +f 1 +f 2 ), 10.01GHz(f m +f 1 -f 2 ), respectively A(f m +f 1 +f 2 )=0.0036V, A(f m +f 1 -f 2 )=0.0029V, then according to formula (4), the frequency of the photoelectric detector under test is 17.61GHz(f m +f 1 +f 2 ) And 10.01GHz (f m +f 1 -f 2 ) Ratio of responsivity
[0...
Example Embodiment
[0062] Example three
[0063] The optical frequency comb output module in this embodiment uses a mode-locked laser with a repetition frequency of 10 GHz, and the dual-drive intensity modulation module uses a dual-drive Mach-Zehnder modulator. Set the signal source 1 to output a sinusoidal microwave signal at a frequency of 4.51 GHz. The frequency of the sinusoidal microwave signal output by the source 2 is 4.5GHz. The optical signal output by the dual-drive intensity modulation module is photoelectrically converted in the photoelectric detector to be measured to form an electrical signal, which is analyzed and measured by the spectrum analysis and data processing module.
[0064] When k=2, the measuring frequency is 29.01GHz (2f m +f 1 +f 2 ), 20.01GHz(2f m +f 1 -f 2 ), respectively A(2f m +f 1 +f 2 )=0.0031V, A(2f m +f 1 -f 2 )=0.0021V, then according to formula (4), the photoelectric detector under test can be obtained at a frequency of 29.01GHz (2f m +f 1 +f 2 ) And 20.01GHz (2f ...
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