Wavelength-tunable optical filters: applications and technologies

Kobrinski, H.; Cheung, Kmc

doi:10.1109/35.35922

Cited by 92 publications

(23 citation statements)

References 34 publications

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“…Steady state transaction times were measured for the system with the same parameters considered in the above sections. Simulation convergence was obtained through the replication/deletion method [20], with a 98% confidence in a less than 2% variation from the mean. Fig.…”

Section: Validation Of the Modelmentioning

confidence: 99%

<title>Collisionless media access protocols for high-speed communication in optically interconnected parallel computers</title>

Bogineni

Dowd

1992

SPIE Proceedings

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Section: Validation Of the Modelmentioning

confidence: 99%

<title>Collisionless media access protocols for high-speed communication in optically interconnected parallel computers</title>

Bogineni

Dowd

1992

SPIE Proceedings

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“…Tunable optical filters are a key component in the interrogation of optical sensors [33], in spectroscopy [34], as well as in video distribution networks [35]. A variety of bandpass tunable filters have been demonstrated in the past decades.…”

Section: Thermally Tunable Extrinsic Fabry-perot Filtermentioning

confidence: 99%

“…(30)- (35) by calculating the diffraction patterns of a single infinite slit under uniform plane-wave illumination. The wavelength of the light was 0.5 m. The width of the slit was 10 m. The aperture plane was sampled to 1024 points along the x axis.…”

Section: B Single Slitmentioning

confidence: 99%

Optical Fiber High Temperature Sensor Instrumentation for Energy Intensive Industries

Cooper¹,

Wang²,

Pickrell³

2006

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Executive SummaryThis report summarizes technical progress during the program "Optical Fiber High Temperature Sensor Instrumentation for Energy Intensive Industries", performed by the Center for Photonics Technology of the Bradley Department of Electrical and Computer Engineering at Virginia Tech. The objective of this program was to use technology recently invented at Virginia Tech to develop and demonstrate the application of self-calibrating optical fiber temperature and pressure sensors to several key energy-intensive industries where conventional, commercially available sensors exhibit greatly abbreviated lifetimes due primarily to environmental degradation.A number of significant technologies were developed under this program, including• a laser bonded silica high temperature fiber sensor with a high temperature capability up to 700°C and a frequency response up to 150 kHz,• the world's smallest fiber Fabry-Perot high temperature pressure sensor (125 x 20 μm) with 700°C capability,• UV-induced intrinsic Fabry-Perot interferometric sensors for distributed measurement,• a single crystal sapphire fiber-based sensor with a temperature capability up to 1600°C.These technologies have been well demonstrated and laboratory tested. Our work plan included conducting major field tests of these technologies at EPRI, Corning, Pratt & Whitney, and Global Energy; field validation of the technology is critical to ensuring its usefulness to U.S. industries. Unfortunately, due to budget cuts, DOE was unable to follow through with its funding commitment to support Energy Efficiency Science Initiative projects and this final phase was eliminated. Accomplishments during the program are summarized briefly here and described in detail in the remainder of the report.→ A cleanroom facility was designed and installed at the Center for Photonics Technology for the fabrication of diaphragm-based Fabry-Perot sensors.→ Sensor testing methods have been developed and effectively utilized to analyze various aspects of sensor performance. A high temperature, high pressure dynamic test system was designed and assembled to allow sensor evaluation at temperature up to 1200 °C, background pressure up to 200 psi, and dynamic pressure more than 140 dB with a frequency of 47 kHz → Borosilicate ring-based engine sensors were designed and fabricated, and their performance characteristics evaluated.→ Photolithography procedures were optimized for etched diaphragm-based sensor fabrication.→ Direct bonding, hydroxide catalysis bonding, and sol-gel-based bonding techniques were investigated for diaphragm/ferrule bonding requirements. Optical Fiber Sensors for Energy Intensive Industries iv→ Laser bonding-based pressure sensors were successfully demonstrated up to 1800 psi.→ A novel demodulation technique was developed, called grating-assisted operating point tuning (GA-OPT), by using a diffraction grating with feedback control. The GA-OPT features dynamic operating-point control, high frequency response, insensitivity to light source fluctuation, and r...

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“…Arrayed or tuneable lasers will be needed for WDMA applications [33]. Because each channel is transmitted at a different wavelength, they can be selected using an optical filter [34]. Tuneable filters can be realized using acousto-optics [35], liquid crystal [36] or fibre Bragg grating [37].…”

Section: Wavelength Division Multiple Access (Wdma)mentioning

confidence: 99%

Introduction to Optical Communications

Ghafouri‐Shiraz

Karbassian

2012

Optical CDMA Networks

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The invention of the solid state ruby laser (acronym for light amplification by stimulated emission of radiation) in May 1960 [1] and the He-Ne gas laser [2] in December 1960 has led to some wide-ranging and very significant scientific and technological progress. This so-called 'discovery of the century', followed by the first use of semiconductor lasers [3][4][5] in communications, heralded the start of optical communications. The laser provided a powerful coherent light source together with the possibility of modulation at high frequency, and this opened up a new portion of the electromagnetic spectrum with frequencies many times higher than those commonly available in radio communication systems. In addition the narrow beam divergence of the laser made enhanced free-space optical transmission a practical possibility.Since optical frequencies are of the order of 100 THz, and information capacity increases directly with frequency bandwidth, the laser potentially offers a few order of magnitude increase in available bandwidth compared with microwave systems. Thus, by using only a small portion of the available frequency spectrum, a single laser could, in principle, carry millions of telephone conversations or TV channels.With the potential of such wideband transmission capabilities in mind, a number of experiments [6] using atmospheric optical channels were carried out in the early 1960s. These experiments showed the feasibility of modulating a coherent optical carrier wave at very high frequencies. However, the high cost of development for all the necessary components, and the limitations imposed on the atmospheric channel by rain, fog, snow and dust make such high-speed systems economically unattractive. However, numerous developments of free-space optical channel systems operating at baseband frequencies were in progress for earth-to-space communications [7,8].It soon became apparent that some form of optical waveguide was required. By 1963, bundles of several hundred glass fibres were already being used for small-scale Optical CDMA Networks: Principles, Analysis and Applications, First Edition. Hooshang Ghafouri-Shiraz and M. Massoud Karbassian.

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Wavelength-tunable optical filters: applications and technologies

Cited by 92 publications

References 34 publications

<title>Collisionless media access protocols for high-speed communication in optically interconnected parallel computers</title>

<title>Collisionless media access protocols for high-speed communication in optically interconnected parallel computers</title>

Optical Fiber High Temperature Sensor Instrumentation for Energy Intensive Industries

Introduction to Optical Communications

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