Fitel USA Corporation

Lucent Technologies Inc.

The University of Sydney Commercial Development & Industry Partnerships

Paul Steinvurzel

Benjamin John Eggleton

Daniel Mahgerefteh

Paul S Westbrook

John A Rogers

Toshio Kimura

Shu Namiki

Yoshihiro Emori

Akira Fujisaki

Thomas G Brown

Kenneth Stephen Feder

Jon W Engelberth

Kirk William Baldwin

Clifford E Headley

Rajan D Deshmukh

Richard J Ramsay

Dong-Il Yeom

Robert A Macharrie

Jean-Christophe Bouteiller

Feng Luan

Jeremy Bolger

Carel Martijn De Sterke

Dane Austin

Akira Fujisakii

A method and apparatus for providing optical supercontinuum. The method comprises creating a spectrally narrow phase feature within a supercontinuum spectrum produced from a laser pulse that has been subjected to supercontinuum generation, thereby producing a modified supercontinuum spectrum, and propagating the modified supercontinuum spectrum through an optical waveguide that is suitable for supercontinuum generation, thereby further modifying the modified supercontinuum spectrum. The method may include modifying the modified supercontinuum spectrum by increasing its energy in a vicinity of the phase feature.

Tunable optical supercontinuum enhancement

In accordance with the invention, a modulated RZ pulse source comprises a modulated light source optically coupled to a stabilized Bragg grating filter and one or more optical taps. The light source is preferably modulated in power and frequency and has an adjustable channel wavelength &#x3bb;. The Bragg grating filter has a reflectivity bandwidth having a high slope reflectivity cutoff and is preferably tunable. A feedback arrangement responsive to the taps keeps the source channel wavelength &#x3bb; on the edge of the reflectivity bandwidth for shaping RZ pulses. When the Bragg grating is stabilized, the feedback system maintains &#x3bb; at a value linked to the grating reflectivity edge and, by overlapping at least part of the optical spectrum of the source, converts the modulated source light into RZ pulses with high extinction ratio (&#x2267;12 dB). The result is a high power, jitter-free RZ pulse source that is compact, inexpensive and power efficient.

Optical pulse source for long haul optical communication systems

A colorless tunable dispersion compensator (TDC) comprises a plurality of N separate dispersion compensation elements, each centered at a different wavelength used in the communication system. A single tuning element is coupled to the plurality of separate dispersion compensation elements. A 1-out-of-N selector (such as a 1&#xd7;N optical switch) is used to select the particular tunable dispersion compensation element to be implemented for an associated channel in the system. Advantageously, the same TDC can then be used in association with each channel in the communication system, as controlled by the 1-out-of-N selector to chose the particular compensation element for a specific channel wavelength.

Colorless tunable dispersion compensator

A multi-wavelength cascaded Raman resonator (&ldquo;MWCRR&rdquo;). The MWCRR has an optical source for pumping optical radiation centered around an input wavelength. The MWCRR further includes a Raman fiber having at least a first set of optical gratings for converting the pumped optical radiation to wavelengths other than the input wavelength. The Raman fiber also has at least one adjustable output coupler having a variable reflectivity for controlling the power of the optical radiation propagating from the at least one set of optical gratings at the wavelengths other than the input wavelength.

Multiwavelength cascaded raman resonator

A thermally tunable optical fiber device comprises a length of optical fiber including a device disposed within a microcapillary heater. The microcapillary heater can include a thin film resistive heater. The fiber itself can optionally include a thin film resistive heater overlying the device, and a plurality of nested microcapillary tubes can optionally provide a plurality of successive concentric heaters overlying the device. The heaters films can be films with uniform, tapered or periodically varying thickness. The heaters can be single layer or multiple layer. Multiple layer films can be superimposed with intervening insulating layers or plural layers can be formed on different angular regions of the microcapillary. Thus one can provide virtually any desired temperature versus length profile along the fiber device.

Thermally tunable fiber devices with microcapillary heaters

A tunable multimode wavelength division multiplex Raman pump and amplifier, and a system, method, and computer program product for controlling a tunable Raman pump and amplifier. The tunability of the pump source is accomplished by either straining or heating an external fiber grating, thereby causing a different wavelength of light to be emitted by the pump source. The system includes a microprocessor-based controller that monitors an amplifier's performance and adjusts the drive current and/or wavelength of the tunable pumps of an amplifier to achieve a target performance.

TUNABLE MULTIMODE LASER DIODE MODULE, TUNABLE MULTIMODE WAVELENGTH DIVISION MULTIPLEX RAMAN PUMP, AND AMPLIFIER, AND A SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR CONTROLLING TUNABLE MULTIMODE LASER DIODES, RAMAN PUMPS, AND RAMAN AMPLIFIERS

Growing community of inventors

Jersey City, NJ, United States of America

Paul Steinvurzel