QT5201U wiki - User contributions [en]

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

2026-09-24T06:28:21Z

A0331484E: /* Abstract */

'''Team members:''' Huang He, Ding Jiahao, Xu Anbang

== Abstract ==

This project investigates thermal drift compensation in a thermally tunable microring resonator (MRR) using DC negative feedback. The MRR transmission response was calibrated, and a thermoelectric cooler (TEC) was used to introduce a thermal disturbance. The photodetector DC output provided feedback to adjust the heater voltage and regulate the optical intensity, while the AC output was used to reconstruct transmitted gesture images. Evaluation of 3,000 images across ten gesture classes gave class-wise reconstruction errors of 2.35%–4.19%. More stable feedback generally corresponded to lower image error, while operation near the resonance valley showed larger fluctuations. These results demonstrate thermal drift compensation with simultaneous image transmission and highlight the importance of operating-point selection.

== Introduction ==

== Methods ==

== Results ==

== Discussion ==

== Conclusion ==

== References ==

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

2026-09-24T06:27:17Z

A0331484E:

'''Team members:''' Huang He, Ding Jiahao, Xu Anbang

== Abstract ==

== Introduction ==

== Methods ==

== Results ==

== Discussion ==

== Conclusion ==

== References ==

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

2026-09-24T06:26:34Z

A0331484E:

== Abstract ==

== Introduction ==

== Methods ==

== Results ==

== Discussion ==

== Conclusion ==

== References ==

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

2026-09-24T06:22:25Z

A0331484E:

__TOC__

== Abstract ==

== Introduction ==

== References ==

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

2026-09-24T06:20:15Z

A0331484E: Blanked the page

Main Page

2026-09-24T06:19:35Z

A0331484E: /* Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications */

<strong>Wiki page for course QT5201U (Quantum control technology) - AY2026/27S1</strong>

This will be the place for documenting projects. To be able to write something to this wiki, we need to create a user login manually. If you have not yet created an account, do let me know - Christian.

'''Next class:''' Mon 17 Aug 2026 in the seminar room S15 level 5.

==Project pages==
===[[Example project title]]===
One sentence, describing what this project is is about.

'''Team members:''' A, B, C

=== [[QKD receiver characterization (Polarization)]] ===

Calibrated polarization-state generator to characterize polarization analysis modules in QKD receivers and rigorously quantify the impact on secure key rates.

'''Team members:''' Elias X. Huber, various AI agents (open to join forces with other humans as well, you can reach me at elias.x.huber[at typical nus sufix]; please note though that I will likely do the experiment at UTown (CREATE Tower), my schedule tends to be a bit inflexible for team-work, and I am a theorist with no lab experience).

=== [[Control and measurement in the bosonic cQED system]] ===
Using control and measurement methods to characterize a dispersively coupled single superconducting cavity and single transmon qubit system, with a thorough review of the theories and experimental techniques behind it.

'''Team members:''' Grace Pang and Seungwon Jin

===[[Multi-tone RFSoC driver for an AOM]]===
A multi-tone RF synthesizer on an RFSoC board to drive an acousto-optic modulator(AOM).

'''Team members:''' Mani Aarthy

===[[Placeholder for project title]]===
TBD.
'''Team members''' Wang Ziyan and Wu Jinbin

===[[Laser Phase Offset Lock]]===
We plan to implement an offset lock to phase stabilize a pair of External Cavity Diode Lasers (ECDL) at a fixed offset of 6.8 GHz, matching the Rb87 ground state hyperfine transition.

'''Team members:''' Bibhuti Thapa, Xu Zifang, Chan Jun Jie

===[[Home-Built ECDL and Optical Sideband Generation]]===

The project includes the construction and characterization of a Littrow ECDL, microwave-driven EOM sideband generation near 6.8 GHz, and optical beat-note techniques for relative frequency stabilization with an existing Rb87 trapping laser.

'''Team member:''' Liu Yiming

===[[Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications]]===
We plan to calibrate a thermally tunable microring resonator, compensate TEC-induced thermal drift using DC feedback, and evaluate gesture-image reconstruction through the AC channel.

'''Team members:''' Huang He, Ding Jiahao, Xu Anbang

===[[Measurement of Coherent States in Phase Space]]===
'''Team members:''' Lim Zi Way, Raghav Sah, Shawn Liew Hong Wei

===[[Design and Construction of a Confocal Microscope for Photonic Material Characterization]]===
'''Team members:''' Kim Sihyung, Ankush Sharma, Liang Shuyi

==Resources==
Some hopefully useful references should go here.
===Recommended literature===
* Bahaa E. A. Saleh, Malvin Carl Teich: Fundamentals of Photonics, Wiley; available as [https://libproxy1.nus.edu.sg/login?url=https://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=26193&site=ehost-live&ebv=EB&ppid=pp_Cover e-book in NUS]. Excellent reference book for many optics topics.
* Mark Fox: Quantum Optics: An Introduction, Oxford University Press; available as [https://libproxy1.nus.edu.sg/login?url=https://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=208564 e-book in NUS]. Nice book on traditional quantum optics topics.
* Christopher C. Davis: Lasers and electro-optics, Cambridge; available as [https://libproxy1.nus.edu.sg/login?url=https://dx.doi.org/10.1017/CBO9781139016629 e-book in NUS]. Good overall book on optics-related aspects useful for controlling quantum systems.

===Recorded classes===

{| class="wikitable"
!Date !! Topic !! Description !! Reference

|-
| 17.8.2026
| [https://youtu.be/tUuzyOVIlxk Paraxial ray optics]
| A recap of how to deal with classical ray optics through ABCD matrices
| Saleh, Teich: Fundamentals of Photonics

|-
| 18.8.2026
| [https://youtu.be/lSKFl8u21_w Paraxial wave optics]
| Working towards Gaussian beams found with lasers...
| same as above

|-
| 24.8.2026
| [https://youtu.be/2HZCak7ODlM Optical cavities 1]
| Fabry-Perot, simple 1D dimensional
|
|-

| 25.8.2026
| [https://youtu.be/GEa3ktnrMrg Optical cavities 2]
| Transverse mode structure, optical coating basics
|
|-

| 14.9.2026
| [https://youtu.be/Lwt6eJe12h0 Homo- and heterodyning basics]
| Radiofrequency origins of mixers, optical version
| any quantum optics text (e.g. Mark Fox, see above)
|-

| 15.9.2026
| [https://youtu.be/2nhP60FKstQ Optical Modularors 1]
| Mostly Electro-optical modulators, some LCD as well
| e.g. Davis: Laser and Electro-optics
|-

|}
Complete playlist: https://www.youtube.com/playlist?list=PLN-Fk1m9cTD4

==Previous version of this course wiki==
* AY2012S2: https://ay2021s2.qt5201.org

== Getting started ==
Consult the [https://www.mediawiki.org/wiki/Special:MyLanguage/Help:Contents User's Guide] for information on using the wiki software.
* [https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:FAQ MediaWiki FAQ]
* Math can be entered in LaTeX style: <code><nowiki><math>r^2=\sqrt{x^2+y^2}</math></nowiki></code> renders as <math>r^2=\sqrt{x^2+y^2}</math>
* Should you miss any module or functionality of this wiki, please contact me (Christian Kurtsiefer).

Main Page

2026-09-24T06:18:01Z

A0331484E: /* Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications */

<strong>Wiki page for course QT5201U (Quantum control technology) - AY2026/27S1</strong>

This will be the place for documenting projects. To be able to write something to this wiki, we need to create a user login manually. If you have not yet created an account, do let me know - Christian.

'''Next class:''' Mon 17 Aug 2026 in the seminar room S15 level 5.

==Project pages==
===[[Example project title]]===
One sentence, describing what this project is is about.

'''Team members:''' A, B, C

=== [[QKD receiver characterization (Polarization)]] ===

Calibrated polarization-state generator to characterize polarization analysis modules in QKD receivers and rigorously quantify the impact on secure key rates.

'''Team members:''' Elias X. Huber, various AI agents (open to join forces with other humans as well, you can reach me at elias.x.huber[at typical nus sufix]; please note though that I will likely do the experiment at UTown (CREATE Tower), my schedule tends to be a bit inflexible for team-work, and I am a theorist with no lab experience).

=== [[Control and measurement in the bosonic cQED system]] ===
Using control and measurement methods to characterize a dispersively coupled single superconducting cavity and single transmon qubit system, with a thorough review of the theories and experimental techniques behind it.

'''Team members:''' Grace Pang and Seungwon Jin

===[[Multi-tone RFSoC driver for an AOM]]===
A multi-tone RF synthesizer on an RFSoC board to drive an acousto-optic modulator(AOM).

'''Team members:''' Mani Aarthy

===[[Placeholder for project title]]===
TBD.
'''Team members''' Wang Ziyan and Wu Jinbin

===[[Laser Phase Offset Lock]]===
We plan to implement an offset lock to phase stabilize a pair of External Cavity Diode Lasers (ECDL) at a fixed offset of 6.8 GHz, matching the Rb87 ground state hyperfine transition.

'''Team members:''' Bibhuti Thapa, Xu Zifang, Chan Jun Jie

===[[Home-Built ECDL and Optical Sideband Generation]]===

The project includes the construction and characterization of a Littrow ECDL, microwave-driven EOM sideband generation near 6.8 GHz, and optical beat-note techniques for relative frequency stabilization with an existing Rb87 trapping laser.

'''Team member:''' Liu Yiming

===[[Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications]]===
We plan to calibrate a thermally tunable microring resonator, compensate TEC-induced thermal drift using DC feedback, and evaluate gesture-image reconstruction through the AC channel.
'''Team members:''' Huang He, Ding Jiahao, Xu Anbang

===[[Measurement of Coherent States in Phase Space]]===
'''Team members:''' Lim Zi Way, Raghav Sah, Shawn Liew Hong Wei

===[[Design and Construction of a Confocal Microscope for Photonic Material Characterization]]===
'''Team members:''' Kim Sihyung, Ankush Sharma, Liang Shuyi

==Resources==
Some hopefully useful references should go here.
===Recommended literature===
* Bahaa E. A. Saleh, Malvin Carl Teich: Fundamentals of Photonics, Wiley; available as [https://libproxy1.nus.edu.sg/login?url=https://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=26193&site=ehost-live&ebv=EB&ppid=pp_Cover e-book in NUS]. Excellent reference book for many optics topics.
* Mark Fox: Quantum Optics: An Introduction, Oxford University Press; available as [https://libproxy1.nus.edu.sg/login?url=https://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=208564 e-book in NUS]. Nice book on traditional quantum optics topics.
* Christopher C. Davis: Lasers and electro-optics, Cambridge; available as [https://libproxy1.nus.edu.sg/login?url=https://dx.doi.org/10.1017/CBO9781139016629 e-book in NUS]. Good overall book on optics-related aspects useful for controlling quantum systems.

===Recorded classes===

{| class="wikitable"
!Date !! Topic !! Description !! Reference

|-
| 17.8.2026
| [https://youtu.be/tUuzyOVIlxk Paraxial ray optics]
| A recap of how to deal with classical ray optics through ABCD matrices
| Saleh, Teich: Fundamentals of Photonics

|-
| 18.8.2026
| [https://youtu.be/lSKFl8u21_w Paraxial wave optics]
| Working towards Gaussian beams found with lasers...
| same as above

|-
| 24.8.2026
| [https://youtu.be/2HZCak7ODlM Optical cavities 1]
| Fabry-Perot, simple 1D dimensional
|
|-

| 25.8.2026
| [https://youtu.be/GEa3ktnrMrg Optical cavities 2]
| Transverse mode structure, optical coating basics
|
|-

| 14.9.2026
| [https://youtu.be/Lwt6eJe12h0 Homo- and heterodyning basics]
| Radiofrequency origins of mixers, optical version
| any quantum optics text (e.g. Mark Fox, see above)
|-

| 15.9.2026
| [https://youtu.be/2nhP60FKstQ Optical Modularors 1]
| Mostly Electro-optical modulators, some LCD as well
| e.g. Davis: Laser and Electro-optics
|-

|}
Complete playlist: https://www.youtube.com/playlist?list=PLN-Fk1m9cTD4

==Previous version of this course wiki==
* AY2012S2: https://ay2021s2.qt5201.org

== Getting started ==
Consult the [https://www.mediawiki.org/wiki/Special:MyLanguage/Help:Contents User's Guide] for information on using the wiki software.
* [https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:FAQ MediaWiki FAQ]
* Math can be entered in LaTeX style: <code><nowiki><math>r^2=\sqrt{x^2+y^2}</math></nowiki></code> renders as <math>r^2=\sqrt{x^2+y^2}</math>
* Should you miss any module or functionality of this wiki, please contact me (Christian Kurtsiefer).

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

2026-09-24T06:14:42Z

A0331484E:

We plan to calibrate a thermally tunable microring resonator, compensate TEC-induced thermal drift using DC feedback, and evaluate gesture-image reconstruction through the AC channel.