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Entry  Thu May 20 17:03:50 2021, Koji, General, General, SRS LCR meter SRS720 borrowed from Downs P_20210520_154841.jpg
    Reply  Sun May 30 15:17:16 2021, Koji, General, General, DCPD AF capacitance measirement PD_cap_meas.pdf20210529013015_IMG_0577.jpeg20210529013114_IMG_0580_2.jpeg20210529013200_IMG_0584.jpeg20210529013229_IMG_0586.jpeg
       Reply  Sun May 30 15:32:56 2021, Koji, General, General, DCPD AF capacitance measirement highQEPD_capacitance.pdfC30665_capacitance.pdf
Message ID: 410     Entry time: Sun May 30 15:32:56 2021     In reply to: 409
Author: Koji 
Type: General 
Category: General 
Subject: DCPD AF capacitance measirement 

Measurement result:

The capacitance at no bias was 460~500pF. This goes down to below 300pF at 1.0~1.5V reverse bias. At maximum +15V, the capacitance goes down to 200~220pF.

On this opportunity, the capacitances of a couple of Excelitas C30665 photodiodes were measured. In Attachment 2, the result was compared with one of the results from the high QE PDs. In general the capacitance of C30665 is lower than the one from the high QE PDs.

Attachment 1: highQEPD_capacitance.pdf  86 kB  Uploaded Sun May 30 16:33:02 2021  | Hide | Hide all
highQEPD_capacitance.pdf
Attachment 2: C30665_capacitance.pdf  81 kB  Uploaded Sun May 30 16:43:55 2021  | Hide | Hide all
C30665_capacitance.pdf
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