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thick semi conducting
Aluminum-Nitride film doped with Ti+3 ions onto a stretched fiber optic cable of 12 micrometer diameter. This SRL was shown to have considerable gain and a low threshold pump power, making it a highly efficient laser system. The light was confined only to the film and did not reflect off of the outer surface of the optical fiber. Such an arrangement is called a "Whispering Gallery Mode". Maqbool and Main plan to expand their work to include the development of nano scale SRLs on carbon nanotubes.
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In the summer of 2010 researchers Dr. Muhammad
Maqbool and Kyle Main of Ball State University and Dr. Martin Kordesch of Ohio University were able to successfully develop the first Aluminum Nitride SRL on the order of 20 micrometers in diameter. This SRL was constructed by depositing a 4 micrometer
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Illustration of a
Semiconductor Ring Laser (SRL). The laser cavity is a waveguide with a racetrack geometry (but this can also be another geometry), which enables it to lase in two counterpropagating directions: clockwise (CW) and counterclockwise (CCW). The light is evanescently coupled out of the
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and highly non-linear nature of the devices, they can be fed a starting signal from either direction. The directionality is maintained as long as the device remains powered. Other potential applications include "a digital response device that reshapes optical signals that have become distorted,
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A European research project formed in 2006 to study potential applications of SRLs. It is known as IOLOS, (Integrated optical logic and memory using ultra-fast micro-ring bistable semiconductor laser), and will receive funding of €1.25 million over three years. Intense
Photonics and
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Muhammad
Maqbool, Kyle Main, and Martin Kordesch, "Titanium-doped sputter-deposited AlN infrared whispering gallery mode microlaser on optical fibers," Opt. Lett. 35, 3637-3639 (2010)
63:. SRLs can be square with corner reflectors, or, as is more common with the smaller designs, have a curved, "racetrack" shape. Devices are currently on the order of a 100
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and all-optical circuits. The first SRLs were developed in the 1980s. Recently, they have been of interest as potential random-access memory storage devices for
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medium. They have the ability to trap light in a ring, and recirculate it continuously as long as they remain powered. The material of choice for SRLs is
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SRLs may serve as the basis of a new form of optical
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Semiconductor ring lasers are literally ring-shaped
121:"Optical memory project builds on ring laser"
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95:are also providing a further €100,000.
36:devices with potential applications in
21:cavity to a straight output waveguide.
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119:Peach, Matthew (2006-11-08).
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26:Semiconductor ring lasers
83:effectively acting as a
184:Optical ring resonators
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46:all-optical computers
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204:Semiconductor lasers
189:Ring laser gyroscope
76:random access memory
53:optical waveguides
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151:"IOLOS website"
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157:on 2016-03-06
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159:. Retrieved
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65:micrometres
179:Ring laser
161:2009-08-19
127:2009-08-19
99:References
34:ring laser
42:photonics
198:Category
173:See also
80:bistable
93:Siemens
55:with a
57:lasing
85:gate
30:SRLs
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107:^
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28:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
