Characterization of large index modification caused by electrical discharge in optical fibers
Presented at Cleo 2009, Baltimore, Maryland, June 2-4, 2009
Electric discharges can change the local glass structure and modify its refractive index
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High core & cladding isolation termination for high power lasers and amplifiers
Presented at Photonics West- San Jose, California, January 27-29, 2009
Fiber lasers and amplifiers are used in a growing number of applications.
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Pump combiner loss as a function of input numerical aperture power distribution
Presented at Photonics West- San Jose, California, January 27-29, 2009
High-power pump combiner designs as well as pump and signal combiner designs become more and more demanding in terms of brightness conservation, whether they are to be used in direct diode applications or in all-fiber lasers or fiber amplifier systems.
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High power monolithically integrated all-fiber laser design using single-chip multimode pumps for high reliability operation
Presented at Photonics West- San Jose, California, January 22-24, 2008
High power fiber lasers and amplifiers are now reaching the manufacturing and commercialization phase.
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Modal Sensitivity Analyses for Single Mode Operation in Large Mode Area Fiber
Presented at Photonics West- San Jose, California, January 22-24, 2008
High power optical fiber systems, whether they constitue an amplifier or lasers, continuous wave or pulsed, have to withstand considerably high power densities in the core region.
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Hi Power Cladding Light Strippers
Presented at Photonics West- San Jose, California, January 22-24, 2008
Fiber lasers and amplifiers are used in a growing number of applications.
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Experimental Synchronization Monitoring of I/Q Data and Pulse-Carving Temporal Misalignment for a Serial-Type 80-Gbit/s RZ-DQPSK Transmitter
Presented at Photonics West 2008, San Jose, California, January 22-24, 2008
Multi-level modulation formats are increasingly important given their inherent spectral efficiency and consequent tolerance to chromatic dispersion.
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Free spectral range optimization of return-to-zero differential phase shift keyed demodulation in the presence of chromatic dispersion
Presented at Photonics West 2008, San Jose, California, January 22-24, 2008
Due to its increased receiver sensitivity and increased tolerance to various fiber-based impairments, differential-phase-shift-keying (DPSK) has been pursued aggressively as an alternative to on-off keying (OOK).
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Tolerances and Receiver Sensitivity Penalties of Multibit Delay Differential-Phase Shift-Keying Demodulation
Presented at Photonics West 2008, San Jose, California, January 22-24, 2008
Differential-Phase shift keying (DPSK) is currently under serious consideration as a deployable data-modulation format for high-capacity optical communication systems due to its high receiver sensitivity and tolerance to certain nonlinear effects.
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Phase-Tunable Low-Loss, S-, C-, and L/Band DPSK and DQPSK Demodulator
Presented at Photonics West 2008, San Jose, California, January 22-24, 2008
Differential phase-shift keying (DPSK) in its different flavours is becoming one of the formats of choice in the deployment of next-generation optical communication systems for 40Gb/s and transoceanic transmission systems.
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Low-Loss S-, C- and L-band Differential Phase Shift Keying Demodulator
Presented at CLEO 07 - Baltimore, Maryland, May 6-11, 2007
Differential phase shift keying (DPSK) in its diverse flavours is arguably becoming a format of choice in the deployment of next generation optical communication systems.
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Mode Field Adaptation for High Power Fiber Lasers
Presented at CLEO 07 - Baltimore, Maryland, May 6-11, 2007
Fiber lasers and amplifiers have received great attention because of their ability to provide high wall-plug efficiency and excellent beam quality even at high power levels.
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Optical Error Correction using Passive Optical Logic Gates Demodulators in Differential Demodulation
Presented at CLEO 07 - Baltimore, Maryland, May 6-11, 2007
Differential phase shift keyed transmission (DPSK) is currently under serious consideration as a deployable data-modulation format for high-capacity optical communication systems due mainly to its 3 dB OSNR advantage over intensity modulation.
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Tapered fused-bundle splitter capable of 1kW CW operation
Presented at Photonics West 2007 - San Jose, California, January 23, 2007
The design tradeoffs involved in manufaturing KW class combiners and splitters are discussed, along with a practical demonstration at KW power levels.
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Experimental investigation on optical spectral deformation of embedded FBG sensors
Presented at Photonics West 2007 - San Jose, California, January 24, 2007
The causes and effects of packaging induced sensor non-linearity are discussed and the response of a high speed interrogator are demonstrated.
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High-power “All-Fiber“components
The missing link for high power fiber lasers
Fiber lasers have shown extraordinary progress in power level, reaching the kilowatt range. These results were achieved with large mode area fibers pumped with high power laser diodes coupled with bulk-optics. To enable the commercial development of these high power fiber lasers, we have demonstrated several All-Fiber® components, which replace the bulk-optic interface in the present laser configurations.
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Fiber coupled pumping concepts for double double-clad fibers
High power package for kilowatt class component and tapered fiber bundles with large core PM fibers
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Tuneable All-Fiber® Delay-Line Interferometer for DPSK Demodulation
François Séguin and François Gonthier
DPSK will be the next generation modulation format. A novel device is required to extract phase modulation at receiver.
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Cleo 2005 Poster
Fiber Laser Design
Fiber lasers have become very attractive laser sources due to their excellent beam quality even at high powers or energies and their ease of cooling.
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