University of Southampton

Other

Amoco Corporation

Qinetiq Limited

British Telecommunications Corporation

Southampton Photonics Limited

Time-Bandwith Products Ag

David Colin Hanna

Richard G Smart

Lars Johan Albinsson Nilsson

John Douglas Minelly

Kurt J Weingarten

William Andrew Clarkson

Graeme W Ross

Peter G R Smith

Ruediger Paschotta

Rudiger Paschotta

David P Shepherd

Anne Christine Tropper

Thomas Sudmeyer

Anthony Brian Neilson

Ruediger Eberhard Paschotta

Anne C Tropper

Corin B E Gawith

Jeremy N Carter

An apparatus for generating at least three visible light beams of different output wavelengths for display purposes includes a passively mode-locked solid-state thin-disk laser and a device, including an optical parametric oscillator (OPO) for at least partially converting the primary light beam into electromagnetic radiation having the at least three different output wavelengths. The OPO is preferably an optical fiber feedback OPO. An optical fiber feedback OPO includes a nonlinear optical element and feedback device for feeding back at least a portion of the radiation emitted by the nonlinear medium to the nonlinear element. The feedback device includes an optical fiber.

Multiwavelength light source using an optical parametric oscillator

An optical waveguide with at least a guiding lamina ( ) of optical material bonded by direct interfacial bonding to a superstructure lamina ( ) of optical material, in which regions of the guiding lamina have modified optical properties so as to define a light guiding path along the guiding lamina. In a particular example, a periodically poled LiNbO planar waveguide is buried in LiTaO by direct interfacial bonding and precision polishing techniques and used in an optical frequency doubling system.

Optical waveguide and fabrication method

Optical amplifier and light source

Single- or few-moded waveguiding cladding-pumped lasers, superfluorescent sources, and amplifiers, as well as lasers, including those for high-energy pulses, are disclosed, in which the interaction between the waveguided light and a gain medium is substantially reduced. This leads to decreased losses of guided desired light as well as to decreased losses through emission of undesired light, compared to devices of the prior art. Furthermore, cross-talk and inter-symbol interference in semiconductor amplifiers can be reduced. We also disclose devices with a predetermined saturation power. As a preferred embodiment of the invention, we disclose a single (transverse) mode optical fiber laser or amplifier in which the active medium (providing gain or saturable absorption) is shaped as a ring, situated in a region of the fiber' cross-section where the intensity of the signal light is substantially reduced compared to its peak value. The fiber can be cladding-pumped.

Optical amplifiers and light source

A beam shaping device for a laser device is provided. The laser device has a beam with a first beam quality factor M.sub.x.sup.2 in a first direction, and a second beam quality factor M.sub.y.sup.2 in an orthogonal direction. The beam shaping device includes at least one reflecting surface diverting at least a first part of the beam in order to reconfigure at least one of the first and second beam qualities M.sub.x.sup.2 and M.sub.y.sup.2.

Beam shaper

Praseodymium doped waveguide lasers

An optical fibre amplifier comprises a thulium-doped optical fibre pumped at 790 nm by a semi-conductor diode laser coupled to the fibre via optical fibre coupler. The amplifier is optically coupled in series to a pair of systems fibres to provide amplification to optical signals.

Optical fibre amplifier and laser

Optical fibre with doped core and doped inner cladding, for use in an

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Southampton, United Kingdom

David Colin Hanna