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Chua Rui Ming: /* A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs) */

2021-04-30T09:17:56Z

A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)

← Older revision		Revision as of 17:17, 30 April 2021
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	===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===		===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===
	Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to ~~emulate (with tweaks)~~ the ~~works~~ of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.		Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to realise the claims of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.

	==Material requests==		==Material requests==

Chua Rui Ming: /* A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs) */

2021-04-30T09:15:54Z

A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)

← Older revision		Revision as of 17:15, 30 April 2021
Line 29:		Line 29:

	===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===		===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===
	Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to emulate (with tweaks) ~~and realise~~ the works of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.		Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to emulate (with tweaks) the works of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.

	==Material requests==		==Material requests==

Chua Rui Ming: /* A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs) */

2021-04-30T09:15:05Z

A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)

← Older revision		Revision as of 17:15, 30 April 2021
Line 29:		Line 29:

	===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===		===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===
	Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to emulate (with tweaks) the works of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.		Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to emulate (with tweaks) and realise the works of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.

	==Material requests==		==Material requests==

Victor Avalos: /* Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rb 87 */

2021-04-30T03:31:03Z

Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rb 87

← Older revision		Revision as of 11:31, 30 April 2021
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	Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.		Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.

	===[[Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rb 87]]===		===[[Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rubidium 87]]===
	With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.		With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.

Victor Avalos: /* Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of 87Rb */

2021-04-30T03:22:49Z

Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of 87Rb

← Older revision		Revision as of 11:22, 30 April 2021
Line 12:		Line 12:
	Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.		Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.

	===Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of ~~<sup>~~87~~</sup>Rb~~===		===[[Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rb 87]]===
	With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.		With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.

Victor Avalos: /* Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of 87Rb */

2021-04-30T03:20:30Z

Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of 87Rb

← Older revision		Revision as of 11:20, 30 April 2021
Line 12:		Line 12:
	Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.		Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.

	===[[Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of <sup>87</sup>Rb]]===		===Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of <sup>87</sup>Rb===
	With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.		With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.

Victor Avalos: /* Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rubidium 87 */

2021-04-30T03:19:38Z

Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of Rubidium 87

← Older revision		Revision as of 11:19, 30 April 2021
Line 12:		Line 12:
	Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.		Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.

	===[[Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of ~~Rubidium~~ 87]]===		===[[Saturated Absorption Spectroscopy + Frequency Modulation Locking on the D2 line of <sup>87</sup>Rb]]===
	With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.~~241~~ nm which corresponds to the transition <math>5S_{1/2} \rightarrow 5P_{3/2}</math> ~~(also known as D2 line)~~ of ~~Rubidium~~ 87. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.		With a combination of the Saturation Spectroscopy and Frequency Modulation techniques, we aim at stabilizing the wavelength of a Diode Laser at approximately 780.246 nm which corresponds to the transition <math>5S_{1/2},F=2 \rightarrow 5P_{3/2},F=3</math> of <sup>87</sup>Rb. Additionally we will implement in the experiment a Red Pitaya, which is a minicomputer capable of replacing things like an Oscilloscope, Function Generator and PID controller. Therefore reducing the space needed for the experiment.

	===[[Control over the atomic spins within certain molecules by NMR technique]]===		===[[Control over the atomic spins within certain molecules by NMR technique]]===

Chua Rui Ming: /* A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs) */

2021-04-28T19:01:53Z

A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)

← Older revision		Revision as of 03:01, 29 April 2021
Line 29:		Line 29:

	===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===		===[[A Nanosecond Pulse Generator based on the Reconfigurable Phase-Locked Loop (PLL) Module in Field Programmable Gate Arrays (FPGAs)]]===
	Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to ~~replicate~~ the works of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.		Field Programmable Gate Arrays (FPGAs) are digital integrated circuits (ICs) that contain blocks of logic and interconnects which can be configured and reconfigured even after it is being deployed "in the field". This enables flexible tunability in the function of FPGA-based devices. We seek to emulate (with tweaks) the works of Zhu & Wang (2015) to utilise the Phase-Locked Loop (PLL) module in FPGA to implement a nanosecond pulse generator with adjustable frequency and pulse width. Our circuit was designed with Quartus Prime.

	==Material requests==		==Material requests==

Chris: /* Stuff to be covered in the lecture slots on Mondays (sometimes Tuesdays as well) */

2021-04-13T10:38:37Z

Stuff to be covered in the lecture slots on Mondays (sometimes Tuesdays as well)

← Older revision		Revision as of 18:38, 13 April 2021
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	\|[https://youtu.be/PHx-da7RLE8 High voltage techniques]		\|[https://youtu.be/PHx-da7RLE8 High voltage techniques]
	\| Working with high voltages requires a spectrum of techniques that is differing from more conventional electronics. A few aspects (field emission, dielectric strength, specific components) are covered.		\| Working with high voltages requires a spectrum of techniques that is differing from more conventional electronics. A few aspects (field emission, dielectric strength, specific components) are covered.

			\|-
			\|12.4.2021
			\|[https://youtu.be/K0U9ySRyvjs Control loops]
			\| Many experimental activities in controlling quantum systems require the control of classical systems, like the temperature stabilization of some device, or the frequency stabilization of a laser. This lecture gives a brief overview of some simple control concepts.

	\|-		\|-

Zhao: /* Wavemeter based on interferometer */

2021-04-08T14:04:34Z

Wavemeter based on interferometer

← Older revision		Revision as of 22:04, 8 April 2021
Line 7:		Line 7:
	==Project proposals==		==Project proposals==
	===[[Wavemeter based on interferometer]]===		===[[Wavemeter based on interferometer]]===
	Basically we are now trying to build a wavemeter ~~which can~~ measure wavelength from 1200nm to 1800nm ~~because the measurement tool~~ for these lasers ~~is not available now~~ in our lab. It is ~~based on Michelson interferometer~~.		Basically, we are now trying to build a wavemeter based on Michelson interferometer. The goal is to measure laser with a wavelength from 1200nm to 1800nm which can be used for these lasers in our lab. This project consists of work about optics and electronic control. The control system is mainly implemented by using a Arduino UNO board and some basic circuits.

	===[[Coincidence Time Measurement of Pulsed Lasers & "Useful" Applications]]===		===[[Coincidence Time Measurement of Pulsed Lasers & "Useful" Applications]]===
	Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.		Proof-of-concept experiment to show how one may use commonly-available materials to measure difference in laser path lengths to sub-millimeter precision with a copper target (TBC). This experiment is done using a 355nm, 120 MHz, 10ps pulsed laser. Upon showing that such a measurement is possible, we shall go on to explore some for-fun applications of this "technology" and see how far and precise we can get.