Lasers and Telecommunication- Outreach Kit - Revision history

Cmditradmin: /* Fiber optics explanation */

2011-03-02T23:37:13Z

Fiber optics explanation

← Older revision		Revision as of 16:37, 2 March 2011
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	=== Fiber optics explanation ===		=== Fiber optics explanation ===
			[[File:TIR in PMMA.jpg\|thumb\|A laser reflects within a piece of plastic]]
	'''Optic fiber transmits light due to total internal reflection.''' Demonstrate light reflecting inside of plastic hose filled with water. Fill the plastic chamber with water and add a pinch of dry milk powder to reveal the light rays. Demonstrate the critical angle where there is total internal reflection. Place a wood plug in the hole in the plastic bottle and fill the bottle with water, place it on top of the plastic case. Position the laser in the support so that it points directly at the end of the plug. Place the larger plastic tub below the stream path. Turn on the laser and pull the plug. Use a white card to interrupt the stream and demonstrate that light is internally reflected in the stream.		'''Optic fiber transmits light due to total internal reflection.''' Demonstrate light reflecting inside of plastic hose filled with water. Fill the plastic chamber with water and add a pinch of dry milk powder to reveal the light rays. Demonstrate the critical angle where there is total internal reflection. Place a wood plug in the hole in the plastic bottle and fill the bottle with water, place it on top of the plastic case. Position the laser in the support so that it points directly at the end of the plug. Place the larger plastic tub below the stream path. Turn on the laser and pull the plug. Use a white card to interrupt the stream and demonstrate that light is internally reflected in the stream.

Cmditradmin at 17:28, 21 September 2010

2010-09-21T17:28:42Z

← Older revision		Revision as of 10:28, 21 September 2010
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	<tr>		<tr>
	<td style="text-align: left; width: 33%">[[Photovoltaics- Outreach Kit\|Previous Topic]]</td>		<td style="text-align: left; width: 33%">[[Photovoltaics- Outreach Kit\|Previous Topic]]</td>
	<td style="text-align: center; width: 33%">[[Main_Page#K-12 Outreach Kits\|K-12 Outreach Kits]]</td>		<td style="text-align: center; width: 33%">[[Main_Page#K-12 Outreach Kits and Labs\|K-12 Outreach Kits and Labs]]</td>

	</tr>		</tr>

Cmditradmin: /* Fiber optics explanation */

2010-07-20T18:58:57Z

Fiber optics explanation

← Older revision		Revision as of 11:58, 20 July 2010
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	'''Optic fiber transmits light due to total internal reflection.''' Demonstrate light reflecting inside of plastic hose filled with water. Fill the plastic chamber with water and add a pinch of dry milk powder to reveal the light rays. Demonstrate the critical angle where there is total internal reflection. Place a wood plug in the hole in the plastic bottle and fill the bottle with water, place it on top of the plastic case. Position the laser in the support so that it points directly at the end of the plug. Place the larger plastic tub below the stream path. Turn on the laser and pull the plug. Use a white card to interrupt the stream and demonstrate that light is internally reflected in the stream.		'''Optic fiber transmits light due to total internal reflection.''' Demonstrate light reflecting inside of plastic hose filled with water. Fill the plastic chamber with water and add a pinch of dry milk powder to reveal the light rays. Demonstrate the critical angle where there is total internal reflection. Place a wood plug in the hole in the plastic bottle and fill the bottle with water, place it on top of the plastic case. Position the laser in the support so that it points directly at the end of the plug. Place the larger plastic tub below the stream path. Turn on the laser and pull the plug. Use a white card to interrupt the stream and demonstrate that light is internally reflected in the stream.

	[[Image:~~Colladon~~'s Lightfountain.JPG\|thumb\|300px\|The light fountain was first demonstrated by Daniel Colladon in 1842]]		[[Image:DanielColladon's Lightfountain or Lightpipe,LaNature(magazine),1884.JPG\|thumb\|300px\|The light fountain was first demonstrated by Daniel Colladon in 1842]]

	=== Index of refraction demo ===		=== Index of refraction demo ===

Cmditradmin: /* Sources for Building Your Own Kit */

2010-06-02T23:25:43Z

Sources for Building Your Own Kit

← Older revision		Revision as of 16:25, 2 June 2010
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	== Sources for Building Your Own Kit ==		== Sources for Building Your Own Kit ==
	[http://depts.washington.edu/cmditr/media/TL-kit.docx Cover art for Telecommunications Kit]		[http://depts.washington.edu/cmditr/media/TL-kit.docx Cover art for Telecommunications Kit]

			[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Image:Optic_Fiber_Network.pdf Optic Fiber Poster for printing]

	*laser pointer		*laser pointer
	*plastic tub		*plastic tub

Cmditradmin: /* Analog vs Digital Signals */

2010-04-26T17:49:00Z

Analog vs Digital Signals

← Older revision		Revision as of 10:49, 26 April 2010
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	=== Analog vs Digital Signals ===		=== Analog vs Digital Signals ===

	~~[[Image:120px-Digital.signal.png\|thumb\|300px\|]]~~
	'''Information can be carried by modulating electrical signals either analog (continuously changing) or digital (discrete values- coded in timed pulses either on or off).''' Show or draw pictures of waveforms of analog and digital signals.		'''Information can be carried by modulating electrical signals either analog (continuously changing) or digital (discrete values- coded in timed pulses either on or off).''' Show or draw pictures of waveforms of analog and digital signals.

128.95.39.187 at 17:31, 15 March 2010

2010-03-15T17:31:48Z

← Older revision		Revision as of 10:31, 15 March 2010
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	[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Optical_Networks Optical Networks]		[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Optical_Networks Optical Networks]

	== ~~Materials in the kit~~ ==		== Sources for Building Your Own Kit ==
	[http://depts.washington.edu/cmditr/media/TL-kit.docx Cover art for Telecommunications Kit]		[http://depts.washington.edu/cmditr/media/TL-kit.docx Cover art for Telecommunications Kit]
	*laser pointer		*laser pointer

128.95.39.187: /* Materials in the kit */

2010-03-15T17:30:29Z

Materials in the kit

← Older revision		Revision as of 10:30, 15 March 2010
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	== Materials in the kit ==		== Materials in the kit ==
			[http://depts.washington.edu/cmditr/media/TL-kit.docx Cover art for Telecommunications Kit]
	*laser pointer		*laser pointer
	*plastic tub		*plastic tub

128.95.39.187: /* Links */

2010-02-11T19:31:30Z

Links

← Older revision		Revision as of 12:31, 11 February 2010
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	== Links ==		== Links ==
	[http://en.wikipedia.org/wiki/Interferometer Wikipedia on interferometry]		[http://en.wikipedia.org/wiki/Interferometer Wikipedia on interferometry]

	[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Dispersion_and_Attenuation_Phenomena Fiber optic materials]		[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Dispersion_and_Attenuation_Phenomena Fiber optic materials]

	[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Optical_Networks Optical Networks]		[http://depts.washington.edu/cmditr/mediawiki/index.php?title=Optical_Networks Optical Networks]


	== Materials in the kit ==		== Materials in the kit ==

128.95.39.187: /* Materials in the kit */

2010-02-11T19:31:01Z

Materials in the kit

← Older revision		Revision as of 12:31, 11 February 2010
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	[http://www.i-fiberoptics.com/educational-detail.php?id=14200 Educational Communication Kit $18 includes fiber, LED photodetector]		[http://www.i-fiberoptics.com/educational-detail.php?id=14200 Educational Communication Kit $18 includes fiber, LED photodetector]

			[http://i-fiberoptics.com/educational-detail.php?id=13700&cat=kits-projects Adventures in Fiber Optics Kit $42]

Cmditradmin: /* Optic Fiber Network Demo */

2009-11-23T21:53:28Z

Optic Fiber Network Demo

@@ Line 45: / Line 45: @@
 '''Fiber optics are used to transmit signals over long distances''' for phone and computer networks, or short distances between computer servers where high speed connections are needed. This usually involves transferring from electrical to optical and back to electrical signals. The optical fiber communications demonstration kit includes a transmitter and a receiver.  Apply the 5V power supply to the demonstration device. This demo shows one way communication. (for two way communication the system would have a receiver and transmitter at both ends). The transmitter has a simple oscillator that controls an LED at the point where the optical fiber enters the device. Light passes along the fiber to the receiver where a photo detector senses the light  and the circuitry coverts the light back into electricity at the Data output lines.  Connect EN and EXT on the transmitter to the +5V positive terminal.  An LED will flash on the Data lines on the receiver,  proving that the signal has made it all the way back to electricity again. Disconnect the optical fiber from the receiver end and show that that the fiber end is flashing, the LED on the data will stop flashing when it stops getting its optical signal. As you bring the fiber back into the receiver the LED will begin flashing again.
-The circuit is controlled with the following logic on the transmitter side. 0 means the line is connected to the ground, 1 means it is connected to the +5V line.
+The circuit is controlled with the following logic on the transmitter side. 0 means the line is connected to the ground, 1 means it is connected to the +5V line. This table explains the logic conditions that can be use to configure the circuit:
-Mode  EN	 EXT	 LED State
+{| class="wikitable" border = "1"
-	0	 0 	OFF
+*CMDITR researchers are concerned with various aspects of the optical network. An electro-optical switch can built using polymers. A key problem is switching speed. New organic molecules may be able to operate at higher speeds than current materials.
 === Polarizing Filter with Laser ===