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Your search keyword '"Charil, A."' showing total 10 results
Start Over Author "Charil, A." Journal ieee photonics technology letters
10 results on '"Charil, A."'

1. Versatile in-line transceiver chip operating in two full-duplex modes at 1.3 and 1.55 μm

Author

D. Robein, A. Leroy, H. Nakajima, and J. Charil

Subjects
Physics, business.industry, Optical receivers, Optoelectronics, Transceiver chip, Electrical and Electronic Engineering, Transceiver, business, Sensitivity (electronics), Atomic and Molecular Physics, and Optics, Line (electrical engineering), Electronic, Optical and Magnetic Materials
Abstract

We describe a transceiver chip which can perform full-duplex operation alternatively in the 1.3 /spl mu/m (TX)/1.5 /spl mu/m (RX) or 1.5 /spl mu/m (TX)/1.3 /spl mu/m (RX) mode. A full duplex sensitivity of -28.4 dBm is reported for the transceiver mode emitting at 1.55 /spl mu/m and receiving at 1.3 /spl mu/m.

Published
2000

2. Wavelength accuracy in distributed phase-shifted DFB lasers

Author

J. Charil, Anne Talneau, and Abdallah Ougazzaden

Subjects
Observational error, Materials science, Geometrical optics, business.industry, Physics::Optics, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Semiconductor laser theory, law.invention, Wavelength, Optics, Transmission (telecommunications), law, Wavelength-division multiplexing, Optoelectronics, Electrical and Electronic Engineering, Optical filter, business
Abstract

In the wavelength-division-multiplexed transmission framework, we investigate the ability of the distributed phase-shifted distributed-feedback (DFB) structure by enlarging the ridge to fulfil the wavelength accuracy required for array fabrication. Measurements on three different phase-shift geometries indicate that the poor localization of the optical mode along the cavity is detrimental to the wavelength accuracy. This study points out the best solution for DFB structure implementable in arrays, using already validated low-cost and high-throughput technologies in a production environment.

Published
1999

3. Time-resolved spectrum characteristics of FSK-modulated dual-mode DFB/DBR lasers

Author

J. Charil and H. Nakajima

Subjects
Materials science, Frequency-shift keying, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Keying, Astrophysics::Cosmology and Extragalactic Astrophysics, Distributed Bragg reflector, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Semiconductor laser theory, law.invention, Optics, Distributed Bragg reflector laser, law, Extremely high frequency, Optoelectronics, Millimeter, Electrical and Electronic Engineering, business, Astrophysics::Galaxy Astrophysics
Abstract

A laser structure enabling simultaneous emission into distributed feedback (DFB) and distributed Bragg reflector (DBR) modes is characterized regarding frequency-shift keying (FSK)-modulated millimeter wave generation. Nonreturn-to-zero (NRZ)-modulation characteristics are measured by using time-resolved spectrum measurement techniques. A high FM efficiency of about 1.3 GHz/mA is reported at 622 Mb/s for 100-GHz-range millimeter waves.

Published
1997

4. Full-duplex performance assessment of in-line transceivers emitting at 1.3 μm and receiving at 1.55 μm

Author

J. Charil, A. Leroy, and H. Nakajima

Subjects
Materials science, business.industry, dBm, Optical performance monitoring, Atomic and Molecular Physics, and Optics, Line (electrical engineering), Electronic, Optical and Magnetic Materials, Optical receivers, Electronic engineering, Optoelectronics, Optical noise, Electrical and Electronic Engineering, Transceiver, business, Sensitivity (electronics)
Abstract

Starting from the signal-to-noise ratio formula for in-line transceivers, we evaluate the receiver performance in full-duplex operation. We show theoretically and experimentally two methods to obtain a system compatible sensitivity. Full-duplex sensitivities of -23.9 dBm and -19.1 dBm are demonstrated at 68 Mb/s and 196 Mb/s, respectively.

Published
1996

5. Suppression of fringe diffraction in localized holographic exposure for DFB laser arrays

Author

A. Talneau, J. Charil, J.P. Chandouineau, and A. Ougazzaden

Subjects
Distributed feedback laser, Materials science, Holographic grating, business.industry, Holography, Grating, Holographic interferometry, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Optics, law, Optoelectronics, Electrical and Electronic Engineering, Photolithography, business, Lithography, Diffraction grating
Abstract

A six-wavelength MQW DFB laser array emitting around 1.55 /spl mu/m realized in a single holographic lithography is described. Fringe-free localized grating isolation is attained using a mask with a novel aperture-edge design. The first-order grating periods as well as the ridge locations can be varied in a large span. The high throughput of holographic lithography is extended to multiwavelength DFB arrays. >

Published
1995

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