研究目的
To demonstrate a photodetector using a commercial quartz tuning fork (QTF) based on the photothermal effect, achieving high detection sensitivity, high linear response, and high saturation power.
研究成果
The QTF-based photodetector demonstrated high photodetection performance, with a photoresponsivity of 515 mV/mW and a detection sensitivity of 0.75 pW at an integration time of 203 s. This paves the way for novel, high-performance optoelectronics devices.
研究不足
The photodetector's performance is affected by environmental temperature variations. Future improvements include using a vacuum package QTF with transparent glass windows and a lower noise transimpedance preamplifier to enhance detection sensitivity.
1：Experimental Design and Method Selection:
The photodetector was designed using a QTF to amplify the photothermal signal. The methodology includes optimizing the operating distance and modulation signal duty ratio for the photodetector.
2：Sample Selection and Data Sources:
A 1550 nm and 980 nm laser was used as the light source to test the photodetector's performance.
3：List of Experimental Equipment and Materials:
Includes a QTF, acousto-optic modulator (AOM), signal generator, G-lens fiber collimator, transimpedance preamplifier, lock-in amplifier, and oscilloscope.
4：Experimental Procedures and Operational Workflow:
The laser source's output is modulated by an AOM, directed to the QTF arm, and the resulting piezoelectric signal is converted into a voltage signal for analysis.
5：Data Analysis Methods:
The photoelectric signal was analyzed for linear response and detection sensitivity using Allan deviation analysis.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
acousto-optic modulator
T-M200-0.1C2J-3-F2P
Gooch&Housego
Modulates the laser source output.
-
lock-in amplifier
Model 7230
AMETEK
Extracts the voltage signal for acquisition.
-
oscilloscope
TDS2012C
Tektronix
Acquires the voltage signal extracted by the lock-in amplifier.
-
quartz tuning fork
Used as the optical detection module in the photodetector to amplify the photothermal signal.
-
signal generator
FY2300A
Feel Tech
Provides modulation signal to control the AOM.
-
G-lens fiber collimator
Outputs laser to the QTF arm.
-
transimpedance preamplifier
CA3140E
Intersil
Detects the piezoelectric signal generated by the QTF and converts it into a voltage signal.
-
登录查看剩余5件设备及参数对照表
查看全部
