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Entry  Sat Jul 28 22:16:49 2018, John Martyn, Update, , Characterization of Transimpedance Amplifier PD_TF1.pdfPD_TF2.pdfPD_and_TIA_Transfer_Function_Measurements.zip
    Reply  Sun Jul 29 00:59:54 2018, Koji, Update, Electronics, Characterization of Transimpedance Amplifier 
Message ID: 14111     Entry time: Sat Jul 28 22:16:49 2018     Reply to this: 14112
Author: John Martyn 
Type: Update 
Category:  
Subject: Characterization of Transimpedance Amplifier 

Kevin and I meaured the transfer function of the photodiode circuit using the Jenne laser and agilent in the 40m lab. The attached figures depict our measured transfer function over the modulation frequency ranges of 30kHz-30MHz and 1kHz-30MHz when the power of the laser was set to 69 and 95 μW. These plots indicate a clear roll off frequency around 300 kHz. In addition, the plots beginning at 1kHz display unstable behavior at frequencies below 30kHz. I am not sure why there is such a sharp change in the transfer function around 30kHz, but I suspect this to be due to an issue with the agilent or photodiode. 

Attachment 1: PD_TF1.pdf  84 kB  Uploaded Sat Jul 28 23:41:32 2018  | Hide | Hide all
PD_TF1.pdf
Attachment 2: PD_TF2.pdf  130 kB  Uploaded Sat Jul 28 23:41:44 2018  | Hide | Hide all
PD_TF2.pdf
Attachment 3: PD_and_TIA_Transfer_Function_Measurements.zip  51 kB  Uploaded Sat Jul 28 23:41:53 2018
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