Characterization of Single Photon Counters - Revision history

Zhenyuan: /* Conclusion */

2022-04-29T09:26:45Z

Conclusion

← Older revision		Revision as of 09:26, 29 April 2022
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	Overall, this module has been a fun ride! Learning/troubleshooting hardware & software have been a breath of fresh air for me. Its been really fulfilling to see my software skills being applied to solve hardware problems/limitations.		Overall, this module has been a fun ride! Learning/troubleshooting hardware & software have been a breath of fresh air for me. Its been really fulfilling to see my software skills being applied to solve hardware problems/limitations.

	Of course, this couldn't have been achieved without the help and advice from the TAs! Many thanks to them!		Of course, this couldn't have been achieved without the help and advice from the TAs & Christian! Many thanks to them!

	==Updates/Progress/Changelog==		==Updates/Progress/Changelog==

Zhenyuan: /* Conclusion */

2022-04-29T09:26:06Z

Conclusion

← Older revision		Revision as of 09:26, 29 April 2022
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	Overall, this module has been a fun ride! Learning/troubleshooting hardware & software have been a breath of fresh air for me. Its been really fulfilling to see my software skills being applied to solve hardware problems/limitations.		Overall, this module has been a fun ride! Learning/troubleshooting hardware & software have been a breath of fresh air for me. Its been really fulfilling to see my software skills being applied to solve hardware problems/limitations.

	Of course, this couldn't have been achieved without the help and advice from the TAs!		Of course, this couldn't have been achieved without the help and advice from the TAs! Many thanks to them!

	==Updates/Progress/Changelog==		==Updates/Progress/Changelog==

Zhenyuan: /* Experimental Discussion/Results: APD counts vs constant LED voltage (result08) */

2022-04-29T09:22:27Z

Experimental Discussion/Results: APD counts vs constant LED voltage (result08)

← Older revision		Revision as of 09:22, 29 April 2022
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	[FIG] (a): Experimental <math>g^{(2)}</math> (b): A sketch of the expected <math>g^{(2)}</math>. <math>g^{(2)}</math> should be close to zero when <math>\tau <</math> dead time of the APD since the APD is not yet ready to detect a new photon. Additionally, after this dead time, <math>g^{(2)}</math> should taper to 1 because the peaks from the APD should be uncorrelated with the subsequent peaks for a LED source.		[FIG] (a): Experimental <math>g^{(2)}</math> (b): A sketch of the expected <math>g^{(2)}</math>. <math>g^{(2)}</math> should be close to zero when <math>\tau <</math> dead time of the APD since the APD is not yet ready to detect a new photon. Additionally, after this dead time, <math>g^{(2)}</math> should taper to 1 because the peaks from the APD should be uncorrelated with the subsequent peaks for a LED source.

	[DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot.		[DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot. For this scenario, using the oscilloscope's histogram function (or some hardware integrator) would be a better alternative.

	==Conclusion==		==Conclusion==

Zhenyuan at 09:12, 29 April 2022

2022-04-29T09:12:55Z

← Older revision		Revision as of 09:12, 29 April 2022
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	Characterization of APDs. Proposed by zhen yuan.		Characterization of APDs. Proposed by yeo zhen yuan.

	==Brief background==		==Brief background==

Zhenyuan: /* Automating the recording of oscilloscope frames */

2022-04-29T09:12:21Z

Automating the recording of oscilloscope frames

← Older revision		Revision as of 09:12, 29 April 2022
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	==Automating the recording of oscilloscope frames==		==Automating the recording of oscilloscope frames==

	The collection of individual oscilloscope frames is typically a tedious process. This would require multiple button presses on the oscilloscope in order to capture a "screenshot" of the oscilloscope screen. If multiple frames are required, this process would take up most of the experimentalist's time. Hence, typically experiments are designed in a way to make use of the oscilloscope's statistical functions, for example, triggering, histograms, averages and standard deviations. Fortunately, for the oscilloscope at hand, the drivers are available online and there is an open-source software to control it (via python). This makes it possible to inspect the source code to modify it to our needs. Here, we would like to collect many oscilloscope frames and process the data using python.		The collection of individual oscilloscope frames is typically a tedious process. This would require multiple button presses on the oscilloscope in order to capture a "screenshot" of the oscilloscope screen. If multiple frames are required, this process would take up most of the experimentalist's time. Hence, typically experiments are designed in a way to make use of the oscilloscope's statistical functions, for example, triggering, histograms, averages and standard deviations. Fortunately, for the oscilloscope at hand, the drivers are available online and there is an open-source software to control it (via python, [https://github.com/zhenyuan992/OpenWave-1KB on github]). This makes it possible to inspect the source code to modify it to our needs. Here, we would like to collect many oscilloscope frames and process the data using python.

	After some troubleshooting/modification of the source code, we are now able to capture multiple frames automatically. Approximately 11 frames per second could be recorded for 10k data points in each frame. The speed of this capturing is determined mainly by the baud rate of the serial communication. Additionally, we improved the user interface to make it easier for others to record multiple frames. Here they can input the number of frames they desire to record and then press record to capture those frames. Those frames are recorded directly into the folder they have chosen.		After some troubleshooting/modification of the source code, we are now able to capture multiple frames automatically. Approximately 11 frames per second could be recorded for 10k data points in each frame. The speed of this capturing is determined mainly by the baud rate of the serial communication. Additionally, we improved the user interface to make it easier for others to record multiple frames. Here they can input the number of frames they desire to record and then press record to capture those frames. Those frames are recorded directly into the folder they have chosen.

Zhenyuan: formatting

2022-04-29T09:07:14Z

formatting

Show changes

Zhenyuan at 08:17, 29 April 2022

2022-04-29T08:17:24Z

@@ Line 130: / Line 130: @@
 [DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot.
 ==Updates/Progress/Changelog==
@@ Line 195: / Line 193: @@
 * Onwards:
   * Data anaylsis
 ==Gallery==

Zhenyuan: /* previous_pages */

2022-04-29T08:08:41Z

previous_pages

← Older revision		Revision as of 08:08, 29 April 2022
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	[DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot.		[DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot.

	==[[previous_pages]]==		==[[previous_pages\|Previous version of this page]]==

	==Updates/Progress/Changelog==		==Updates/Progress/Changelog==

Zhenyuan at 08:05, 29 April 2022

2022-04-29T08:05:59Z

@@ Line 195: / Line 195: @@
 * Onwards:
   * Data anaylsis
 ==Gallery==

Zhenyuan at 08:04, 29 April 2022

2022-04-29T08:04:50Z

← Older revision		Revision as of 08:04, 29 April 2022
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	[DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot.		[DISCUSSION] The calculation of <math>g^{(2)}</math> led to unexpected results. We suspect that this may be due to the small sample size: 450 frames x ~10 peaks per frame. We suspect that collecting a larger dataset would enable us to approach the expected <math>g^{(2)}</math> plot.

	[[~~previous pages~~]]		==[[previous_pages]]==

	==Updates/Progress/Changelog==		==Updates/Progress/Changelog==