Macquarie University

Lighthouse Technologies Pty Ltd.

Richard Paul Mildren

Helen Margaret Pask

David James Spence

Jipeng Lin

Ondrej Kitzler

James Austin Piper

Stephen Webster

Graeme P A Malcolm

Nils Hempler

Aaron McKay

David Coutts

Aravindan Warrier

Hamish Ogilvy

Graeme Malcolm

Aaron Mckay

A single longitudinal mode ring Raman laser including: a pump source outputting a pump light power, resonantly coupled to a first ring resonator; a optical measurement and piezo-actuator for stabilising the resonant coupling of the pump light power to a first ring resonator; a first ring resonator including a Raman gain medium, wherein the Raman gain medium receives the pump light power and undergoes Raman lasing generating resonated Stokes power at the corresponding Stokes output wavelength; the first ring resonator acting as a feedback loop for the pump light power and the resonated Stokes power and outputting a portion of the Stokes power as the laser output.

Single longitudinal mode ring Raman laser

The disclosure herein generally relates to a system () for converting an input light () into an output light beam () that has a spatial beam quality that is greater than that of the input light (). The system () comprises an optical resonator having disposed therein a Raman crystal (). The Raman crystal () is for receiving the input light () and the optical resonator is configured to resonate a Stokes light beam () generated from the input light () by at least one nonlinear interaction within the Raman crystal (). The at least one nonlinear interaction comprises at least one Raman interaction. The Stokes light beam () has a spatial beam quality that is greater than that of the input light (). The system () comprises a light extractor () arranged to generate the output light beam () by extracting at least some of the Stokes light beam () from the optical resonator.

Method and a system for converting an input light into an output light beam

A mid- to far-infrared solid state Raman laser system comprising a resonator cavity comprising: an input reflector adapted to be highly transmissive for light with a first wavelength in the range of about 3 to about 7.5 micrometers for admitting the first beam to the resonator cavity; and an output reflector adapted to be partially transmissive for light with a second wavelength greater than about 5.5 micrometers for resonating the second wavelength in the resonator and for outputting an output beam, the input reflector further being adapted to be highly reflective at the second wavelength for resonating the second wavelength in the resonator; and a solid state diamond Raman material located in the resonator cavity for Raman shifting the pump beam and generating the second wavelength.

Mid to far infrared diamond Raman laser systems and methods

A method and system for generating a Raman second Stokes light to a source light comprising generating a Raman first Stokes light from the source light by a Raman interaction in a nonlinear optical medium disposed in an optical resonator, and resonating the Raman first Stokes light in the optical resonator; generating a seed light at the frequency of the Raman second Stokes light from the source light and the Raman first Stokes light by a four wave mixing process which is not phase matched in the nonlinear medium; amplifying the seed light by transferring power from the first Stokes light resonating in the optical resonator to the seed light using a Raman amplification process in the nonlinear medium; and extracting from the optical resonator a majority of the power of the seed light so amplified.

Method and a system for generating a Raman second Stokes light to a source light

Disclosed herein is a device () for converting a light () received thereby. The device () comprises a resonating structure () comprising a Raman medium. The resonating structure is arranged to resonate Raman light () generated by a Raman interaction between the Raman medium and the light () when so received.

Device and method for converting a light and a laser system

The invention provides a laser system () wherein the output may be selected from two or more different wavelengths of output laser light. The system () comprises a laser capable of having at least two different wavelengths of laser light resonating in the cavity () simultaneously. One of the frequencies is generated by a Raman crystal () which shifts the frequency of light generated by the lasing medium (). A tunable non-linear medium (), such as LBO, is provided in the cavity for selectively frequency converting at least one of the at least two different wavelengths of laser light. The conversion may be SHG, SFG or DFG for example. A tuner () is provided to tune the non-linear medium to select the particular wavelength to convert. Temperature tuning or angle tuning of the non-linear medium can be used. A Q switch () may also be provided in the cavity. The output laser beam can be used for treatment, detection or diagnosis of a selected area on or in a subject, and can be used in opthalmological and dermatological fields.

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Abbotsford, Australia

Richard Paul Mildren