Photodiodes as Single Photon Detectors - Revision history

Abassyahbana: /* Doing experiment */

2024-04-27T04:04:05Z

Doing experiment

← Older revision		Revision as of 12:04, 27 April 2024
Line 21:		Line 21:
	According to the specific experiment, we have designed two circuits. One of them was emitting circuit and the other one was receiving circuit. For the emitting circuit, we also used LED as the light source. By changing the voltage applied to that LED, we can control the intensity of emission. As the same time, we also measured the current through LED. For the receiving part, we also used LED to receive the light. However, by reversing the direction of LED, which would response to different wavelengths of light and produced the current. Then, by measuring the voltage of the resister, which was series connected in the circuit through oscillograph, we could detect the signals.		According to the specific experiment, we have designed two circuits. One of them was emitting circuit and the other one was receiving circuit. For the emitting circuit, we also used LED as the light source. By changing the voltage applied to that LED, we can control the intensity of emission. As the same time, we also measured the current through LED. For the receiving part, we also used LED to receive the light. However, by reversing the direction of LED, which would response to different wavelengths of light and produced the current. Then, by measuring the voltage of the resister, which was series connected in the circuit through oscillograph, we could detect the signals.

	In the experiment, we have used 4 different colors red, blue, green and orange served as emitter color and receiver color separately. Then recorded the intensity showed in the oscillograph. Controlled the other parameters and concentrated just on the color. Mostly the voltage of signal we found are only around 0.5mV. However, we also discovered that some special LED pairs can reach the voltage about 20mV, which is far large than the others. I thought that situation was very interesting and tried to identify the inner relation between them.		In the experiment, we have used 4 different colors red, blue, green and orange served as emitter color and receiver color separately. Then recorded the intensity showed in the oscillograph. Controlled the other parameters and concentrated just on the color. Mostly the voltage of signal we found are only around 0.5mV. However, we also discovered that some special LED pairs can reach the voltage about 20mV, which is far large than the others. We thought that situation was very interesting and tried to identify the inner relation between them.

	===Results===		===Results===

Abassyahbana: /* Equipment */

2024-04-27T04:02:46Z

Equipment

← Older revision		Revision as of 12:02, 27 April 2024
Line 3:		Line 3:
	==Setup==		==Setup==
	===Equipment===		===Equipment===
	:~~Photodiodes~~		:Power Source
	:Arduino Uno		:Arduino Uno
	:Resistors		:Resistors
	:Breadboard		:Breadboard
	:Jump wires		:Jump wires
	:~~Light Bulb~~		:Variety of LEDs
	:~~Grating~~		:Oscilloscope
			:Probe

	===Circuit Overview===		===Circuit Overview===

SorakadoAo: /* Setup (Tentative) */

2024-04-26T14:08:42Z

Setup (Tentative)

@@ Line 1: / Line 1: @@
 In this project, we use several photodiodes as Single Photon Avalanche Detectors (SPADs). We use a light bulb as the light source and grating to vary the wavelength of the light source. We will build a passive quenching configuration to get photons detected. Thus, by knowing which light source is working for the LEDs to detect photons, we can determine band gaps of each LEDs.
-==Setup (Tentative)==
+==Setup==
 ===Equipment===
 :Photodiodes
@@ Line 13: / Line 13: @@
 ===Circuit Overview===
 ===Software===

Abassyahbana: /* Equipment */

2024-02-22T03:36:50Z

Equipment

← Older revision		Revision as of 11:36, 22 February 2024
Line 4:		Line 4:
	===Equipment===		===Equipment===
	:Photodiodes		:Photodiodes
	Arduino Uno		:Arduino Uno
	Resistors		:Resistors
	Breadboard		:Breadboard
	Jump wires		:Jump wires
	Light Bulb		:Light Bulb
	Grating		:Grating

	===Circuit Overview===		===Circuit Overview===
	===Software===		===Software===

Abassyahbana: /* Equipment */

2024-02-22T03:36:38Z

Equipment

← Older revision		Revision as of 11:36, 22 February 2024
Line 3:		Line 3:
	==Setup (Tentative)==		==Setup (Tentative)==
	===Equipment===		===Equipment===
	Photodiodes		:Photodiodes
	Arduino Uno		Arduino Uno
	Resistors		Resistors

Abassyahbana: /* Equipment */

2024-02-22T03:36:27Z

Equipment

← Older revision		Revision as of 11:36, 22 February 2024
Line 3:		Line 3:
	==Setup (Tentative)==		==Setup (Tentative)==
	===Equipment===		===Equipment===
	::Photodiodes		Photodiodes
	::Arduino Uno		Arduino Uno
	::Resistors		Resistors
	::Breadboard		Breadboard
	::Jump wires		Jump wires
	::Light Bulb		Light Bulb
	::Grating		Grating

	===Circuit Overview===		===Circuit Overview===
	===Software===		===Software===

Abassyahbana at 03:36, 22 February 2024

2024-02-22T03:36:04Z

← Older revision		Revision as of 11:36, 22 February 2024
Line 1:		Line 1:
	In this project, we use several photodiodes as Single Photon Avalanche Detectors (SPADs). We use a light bulb as the light source and grating to vary the wavelength of the light source. We will build a passive quenching configuration to get photons detected. Thus, by knowing which light source is working for the LEDs to detect photons, we can determine band gaps of each LEDs.		In this project, we use several photodiodes as Single Photon Avalanche Detectors (SPADs). We use a light bulb as the light source and grating to vary the wavelength of the light source. We will build a passive quenching configuration to get photons detected. Thus, by knowing which light source is working for the LEDs to detect photons, we can determine band gaps of each LEDs.

			==Setup (Tentative)==
			===Equipment===
			::Photodiodes
			::Arduino Uno
			::Resistors
			::Breadboard
			::Jump wires
			::Light Bulb
			::Grating
			===Circuit Overview===
			===Software===

Abassyahbana: Created page with "In this project, we use several photodiodes as Single Photon Avalanche Detectors (SPADs). We use a light bulb as the light source and grating to vary the wavelength of the light source. We will build a passive quenching configuration to get photons detected. Thus, by knowing which light source is working for the LEDs to detect photons, we can determine band gaps of each LEDs."

2024-02-22T03:25:12Z

Created page with "In this project, we use several photodiodes as Single Photon Avalanche Detectors (SPADs). We use a light bulb as the light source and grating to vary the wavelength of the light source. We will build a passive quenching configuration to get photons detected. Thus, by knowing which light source is working for the LEDs to detect photons, we can determine band gaps of each LEDs."

New page

In this project, we use several photodiodes as Single Photon Avalanche Detectors (SPADs). We use a light bulb as the light source and grating to vary the wavelength of the light source. We will build a passive quenching configuration to get photons detected. Thus, by knowing which light source is working for the LEDs to detect photons, we can determine band gaps of each LEDs.