QT5201U wiki - Recent changes [en]

Time-bin QKD

Jinbin5 — Tue, 06 Oct 2026 12:00:28 GMT

Producing a short pulse

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 == Theoretical Background ==
 == List of Equipment ==
-== Experiment Setup ==
+{| class="wikitable"
 == Result and Discussion ==
 == Conclusion ==

Main Page

Sihyung — Tue, 06 Oct 2026 07:20:29 GMT

Design and Construction of a Confocal Microscope for Photonic Material Characterization

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	===[[Design and Construction of a Confocal Microscope for Photonic Material Characterization]]===		===[[Design and Construction of a Confocal Microscope for Photonic Material Characterization]]===
			Design and construct a confocal microscope for second-harmonic generation imaging and characterization of periodically poled lithium niobate (PPLN) photonic chip.

	'''Team members:''' Kim Sihyung, Ankush Sharma, Liang Shuyi		'''Team members:''' Kim Sihyung, Ankush Sharma, Liang Shuyi


	===[[FPGA-Based Magnetic Field Sensing and Control]]===		===[[FPGA-Based Magnetic Field Sensing and Control]]===

Time-bin QKD

Jinbin5 — Mon, 05 Oct 2026 07:14:57 GMT

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	~~<inputbox>~~		'''Team Members''': Wang Ziyan, Wu Jinbin
	~~type~~=~~create~~
	~~width~~=~~100~~		== Summary ==
	~~break~~=no		The project is to implement time-bin QKD on the encoding and decoding ends.
	~~buttonlabel~~=~~Create new article~~
	~~placeholder~~=~~Article title~~		== Theoretical Background ==
	~~</inputbox>~~
			== List of Equipment ==

			== Experiment Setup ==

			== Result and Discussion ==

			== Conclusion ==

Time-bin QKD

Jinbin5 — Mon, 05 Oct 2026 07:04:25 GMT

Created page with "<inputbox> type=create width=100 break=no buttonlabel=Create new article placeholder=Article title </inputbox>"

New page

<inputbox>
type=create
width=100
break=no
buttonlabel=Create new article
placeholder=Article title
</inputbox>

Main Page

Jinbin5 — Mon, 05 Oct 2026 06:55:19 GMT

update project name and brief summary of content

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	'''Team members:''' Mani Aarthy		'''Team members:''' Mani Aarthy

	===[[~~Placeholder for project title~~]]===		===[[Time-bin QKD]]===
	~~TBD.~~
	'''Team members''' Wang Ziyan and Wu Jinbin		'''Team members''' Wang Ziyan and Wu Jinbin

Main Page

Ling chen — Mon, 05 Oct 2026 06:06:55 GMT

Project pages

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	===[[FPGA-Based Magnetic Field Sensing and Control]]===		===[[FPGA-Based Magnetic Field Sensing and Control]]===
	'''Team members:''' Zhou Jinyu, Yang Jintao		'''Team members:''' Zhou Jinyu, Yang Jintao


			===[[Generation and Control of Dual-Polarization Electro-Optic Frequency Combs in a Microresonator]]===

			'''Team members:''' Deng Boyang, Ling Chen

	==Resources==		==Resources==

Main Page

Chris — Wed, 30 Sep 2026 04:18:25 GMT

Recorded classes

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	\|-		\|-

	\| 25.9.2026		\| 28.9.2026
	\| [https://youtu.be/9sV3LqsYefY Optical Modularors 2]		\| [https://youtu.be/9sV3LqsYefY Optical Modularors 2]
	\| Acousto-optical Modulators		\| Acousto-optical Modulators
	\| e.g. Davis: Laser and Electro-optics		\| e.g. Davis: Laser and Electro-optics
	\|-		\|-

			\| 29.9.2026
			\| [https://youtu.be/WHXhpIAZ_Tc Optical Fibers]
			\| Optical Fibers
			\| a good reference: Saleh, Teich: Fundamentals of Photonics
			\|-


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

FPGA-Based Magnetic Field Sensing and Control

Yang Jintao — Tue, 29 Sep 2026 06:04:07 GMT

Created page with "This project focuses on FPGA-based magnetic field sensing and control. The system uses magnetic field sensors together with FPGA-based signal acquisition and processing to achieve real-time magnetic field measurement and control. '''Team members:''' Zhou Jinyu, Yang Jintao == Idea == == Setup == == Measurements/Results == == References =="

New page

This project focuses on FPGA-based magnetic field sensing and control.

The system uses magnetic field sensors together with FPGA-based signal acquisition and processing to achieve real-time magnetic field measurement and control.

'''Team members:''' Zhou Jinyu, Yang Jintao

== Idea ==

== Setup ==

== Measurements/Results ==

== References ==

Main Page

Yang Jintao — Tue, 29 Sep 2026 05:52:17 GMT

Project pages

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


			===[[FPGA-Based Magnetic Field Sensing and Control]]===
			'''Team members:''' Zhou Jinyu, Yang Jintao

	==Resources==		==Resources==

Main Page

Chris — Tue, 29 Sep 2026 04:22:56 GMT

Recorded classes

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	\|-		\|-

			\| 25.9.2026
			\| [https://youtu.be/9sV3LqsYefY Optical Modularors 2]
			\| Acousto-optical Modulators
			\| e.g. Davis: Laser and Electro-optics
			\|-
	\|}		\|}
	Complete playlist: https://www.youtube.com/playlist?list=PLN-Fk1m9cTD4		Complete playlist: https://www.youtube.com/playlist?list=PLN-Fk1m9cTD4

Multi-tone RFSoC driver for an AOM

Aarthy mani — Mon, 28 Sep 2026 23:03:27 GMT

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	The synthesiser must support two operating modes on the same hardware:		The synthesiser must support two operating modes on the same hardware:

	1) Ion mode ~~---~~ few tones (~~1--4~~) per channel, optimised for phase purity and deterministic inter-tone phase relationships~~, as required for M{\o}lmer--S{\o}rensen gates~~.		1) Ion mode — few tones (1–4) per channel, optimised for phase purity and deterministic inter-tone phase relationships.
	2) Atom mode ~~---~~ many tones (~~32--64~~) per channel, optimised for intermodulation suppression and linear frequency chirping~~, as required for tweezer arrays and atom transport~~.		2) Atom mode — many tones (32–64) per channel, optimised for intermodulation suppression and linear frequency chirping.

			The FPGA prototype serves two purposes: it is a usable instrument in its own right, and it is the architectural and algorithmic testbench for a subsequent ASIC implementation depending on the outcome
	The FPGA prototype serves two purposes: it is a usable instrument in its own right, and it is the architectural and algorithmic testbench for a subsequent ~~\SI{22}{\nano\meter} FDSOI~~ ASIC.


	== ~~Introduction~~ ==		== Background ==

	== Methods ==		== Methods ==
			1) Include software packages, hardware resources

	== Results ==		== Results ==

	== Discussion ==		== Conclusion & Discussion ==

	~~== Conclusion~~ ==

	== References ==		== References ==

Multi-tone RFSoC driver for an AOM

Aarthy mani — Mon, 28 Sep 2026 21:21:28 GMT

Created page with "'''Team member:''' Mani Aarthy == Objective == Design, implement, and characterise a multi-tone RF synthesiser on an RFSoC platform capable of driving AODs or AOMs used for trapped-ion and neutral-atom qubit control. The synthesiser must support two operating modes on the same hardware: 1) Ion mode --- few tones (1--4) per channel, optimised for phase purity and deterministic inter-tone phase relationships, as required for M{\o}lmer--S{\o}rensen gates. 2) Atom m..."

New page

'''Team member:''' Mani Aarthy

== Objective ==
Design, implement, and characterise a multi-tone RF synthesiser on an RFSoC platform capable of driving AODs or AOMs used for trapped-ion and neutral-atom qubit control.

The synthesiser must support two operating modes on the same hardware:

1) Ion mode --- few tones (1--4) per channel, optimised for phase purity and deterministic inter-tone phase relationships, as required for M{\o}lmer--S{\o}rensen gates.
2) Atom mode --- many tones (32--64) per channel, optimised for intermodulation suppression and linear frequency chirping, as required for tweezer arrays and atom transport.

The FPGA prototype serves two purposes: it is a usable instrument in its own right, and it is the architectural and algorithmic testbench for a subsequent \SI{22}{\nano\meter} FDSOI ASIC.

== Introduction ==

== Methods ==

== Results ==

== Discussion ==

== Conclusion ==

== References ==

Main Page

Ziyan — Sun, 27 Sep 2026 14:13:19 GMT

Placehold for project title

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	TBD.		TBD.
	'''Team members''' Wang Ziyan and Wu Jinbin		'''Team members''' Wang Ziyan and Wu Jinbin


	===[[Laser Phase Offset Lock]]===		===[[Laser Phase Offset Lock]]===

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

A0331484E — Thu, 24 Sep 2026 06:28:21 GMT

Abstract

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	~~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

			== 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 ==

Main Page

A0331484E — Thu, 24 Sep 2026 06:19:35 GMT

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

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	===[[Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications]]===		===[[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		'''Team members:''' Huang He, Ding Jiahao, Xu Anbang


	===[[Measurement of Coherent States in Phase Space]]===		===[[Measurement of Coherent States in Phase Space]]===

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

A0331484E — Thu, 24 Sep 2026 06:14:42 GMT

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	plan		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.

Measurement of Coherent States in Phase Space

Cbarectasaurus — Tue, 22 Sep 2026 02:21:34 GMT

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	== Introduction ==		== Introduction ==

			== References ==

Main Page

Sihyung — Mon, 21 Sep 2026 10:28:12 GMT

Project pages

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

Measurement of Coherent States in Phase Space

Cbarectasaurus — Mon, 21 Sep 2026 06:13:05 GMT

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	~~hello test test~~		'''Team members:''' Lim Zi Way, Raghav Sah, Shawn Liew Hong Wei

			__TOC__

			== Abstract ==

			== Introduction ==

Measurement of Coherent States in Phase Space

Cbarectasaurus — Mon, 21 Sep 2026 05:57:55 GMT

Created page with "hello test test"

New page

hello test test

Main Page

Cbarectasaurus — Mon, 21 Sep 2026 05:57:09 GMT

Measurement of Coherent States in Phase Space

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

	==Resources==		==Resources==

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

Moxi — Sun, 20 Sep 2026 13:53:30 GMT

Created page with "plan"

New page

plan

Main Page

Moxi — Sun, 20 Sep 2026 13:51:58 GMT

Project pages

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	'''Team member:''' Liu Yiming		'''Team member:''' Liu Yiming


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

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

	==Resources==		==Resources==

Main Page

Chris — Sun, 20 Sep 2026 05:42:39 GMT

Recorded classes

← Older revision		Revision as of 13:42, 20 September 2026
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	\| Radiofrequency origins of mixers, optical version		\| Radiofrequency origins of mixers, optical version
	\| any quantum optics text (e.g. Mark Fox, see above)		\| 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
	\|-		\|-

Main Page

Yiming — Sat, 19 Sep 2026 08:55:05 GMT

Home-Built ECDL and Optical Sideband Generation

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

	==Resources==		==Resources==

Laser Phase Offset Lock

Bibhuti — Fri, 18 Sep 2026 07:06:33 GMT

Project Plans

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	2. Frequency stabilise one of the ECDLs to the Rb87 <sup>5</sup>S<sub>1/2</sub> → <sup>5</sup>P<sub>3/2</sub>.		2. Frequency stabilise one of the ECDLs to the Rb87 <sup>5</sup>S<sub>1/2</sub> → <sup>5</sup>P<sub>3/2</sub>.

			3. Create a beat signal between the two lasers via heterodyning.

			4. Phase modulate laser to obtain a 6.8 GHz beat signal and stabilise it at this fixed offset

Laser Phase Offset Lock

Zifang — Fri, 18 Sep 2026 06:44:40 GMT

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	Offset Lock to phase modulate a pair of External Cavity Diode Lasers (ECDLs) for ~~use~~ in Rb87 ~~clock transition~~.		Offset Lock to phase modulate a pair of External Cavity Diode Lasers (ECDLs) separated by 6.8 GHz for manipulating between the hyperfine ground levels in Rb87.

	===Project Plans===		===Project Plans===

Laser Phase Offset Lock

Bibhuti — Fri, 18 Sep 2026 06:40:38 GMT

Project Plans

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	1. Assemble two ECDLs.		1. Assemble two ECDLs.

	2. Frequency stabilise one of the ECDLs to the Rb87 <sup>5</sup>S<sub>1/2</sub> &rarr <sup>5</sup>P<sub>3/2</sub>.		2. Frequency stabilise one of the ECDLs to the Rb87 <sup>5</sup>S<sub>1/2</sub> → <sup>5</sup>P<sub>3/2</sub>.