Patents by Inventor Helen M. Pask
Helen M. Pask has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11322905Abstract: 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.Type: GrantFiled: December 22, 2017Date of Patent: May 3, 2022Assignee: Macquarie UniversityInventors: David James Spence, Ondrej Kitzler, Jipeng Lin, Richard Paul Mildren, Helen M. Pask, Graeme P. A. Malcolm, Nils Hempler, Stephen Webster
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Publication number: 20210075182Abstract: 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.Type: ApplicationFiled: December 22, 2017Publication date: March 11, 2021Applicant: Macquarie UniversityInventors: David James Spence, Ondrej Kitzler, Jipeng Lin, Richard Paul Mildren, Helen M. Pask, Graeme P. A. Malcolm, Nils Hempler, Stephen Webster
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Patent number: 10944232Abstract: A frequency electromagnetic radiation generation system including: a non linear crystal producing THz frequency electromagnetic radiation; a fundamental beam that interacts with the non linear crystal thereby emitting a THz frequency electromagnetic radiation emission; a silicon intermediary coupled to the non linear crystal for output channeling the THz frequency electromagnetic radiation emission to an output environment; the system utilising a fundamental beam which has a photon energy below the bandgap energy of silicon.Type: GrantFiled: March 23, 2018Date of Patent: March 9, 2021Assignee: Macquarie UniversityInventors: Andrew Lee, Helen M. Pask, David James Spence
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Publication number: 20200014166Abstract: A frequency electromagnetic radiation generation system including: a non linear crystal producing THz frequency electromagnetic radiation; a fundamental beam that interacts with the non linear crystal thereby emitting a THz frequency electromagnetic radiation emission; a silicon intermediary coupled to the non linear crystal for output channeling the THz frequency electromagnetic radiation emission to an output environment; the system utilising a fundamental beam which has a photon energy below the bandgap energy of silicon.Type: ApplicationFiled: March 23, 2018Publication date: January 9, 2020Inventors: Andrew LEE, Helen M. PASK, David James SPENCE
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Patent number: 9941660Abstract: A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one of the beams presentType: GrantFiled: November 9, 2012Date of Patent: April 10, 2018Assignee: Macquarie UniversityInventors: Jipeng Lin, Helen M. Pask, David James Spence, Craig J. Hamilton, Graeme P. A. Malcolm
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Publication number: 20140269787Abstract: A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one of the beams presentType: ApplicationFiled: November 9, 2012Publication date: September 18, 2014Applicant: Macquarie UniversityInventors: Jipeng Lin, Helen M. Pask, David James Spence, Craig J. Hamilton, Graeme P. Malcolm
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Patent number: 6901084Abstract: The present invention relates to a stable solid-state Raman laser, the solid-state Raman laser including a resonator cavity defined by at least two reflectors, a laser material located in the resonator cavity and capable of generating a cavity laser beam which propagates within the resonator cavity, a solid Raman medium located in the resonator cavity for shifting the frequency of the cavity laser beam to produce a Raman laser beam which propagates within the resonator cavity; and an output coupler for coupling and outputting the Raman laser beam from the resonator cavity, wherein at least one parameter selected from the group consisting of the position of the laser material relative to the position of the Raman medium in the cavity, the length of the cavity and the curvature of at least one of the reflectors, is selected such that changes in the focal lengths of both the laser material and the Raman medium as a result of thermal effects in the laser material and the Raman medium during operation of the laserType: GrantFiled: July 26, 2001Date of Patent: May 31, 2005Assignee: Macquarie Research Ltd.Inventors: Helen M. Pask, James A. Piper
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Publication number: 20040028090Abstract: The present invention relates to a stable solid-state Raman laser (1), the solid-state Raman laser including: (a) a resonator cavity defined by at least two reflectors (M1 and M2), (b) a laser material (2A) located in the resonator cavity and capable of generating a cavity laser beam which propagates within the resonator cavity, (c) a solid Raman medium (7) located in the resonator cavity for shifting the frequency of the cavity laser beam to produce a Raman laser beam which propagates within the resonator cavity; and (d) an output coupler (M2) for coupling and outputting the Raman laser beam from the resonator cavity, wherein at least one parameter selected from the group consisting of (i) the position of the laser material (2A) relative to the position of the Raman medium (7) in the cavity, (ii) the length of the cavity and (iii) the curvature of at least one of the reflectors (M1 or M2), is selected such that changes in the focal lengths of both the laser material (2A) and the Raman medium (7) as a resultType: ApplicationFiled: September 2, 2003Publication date: February 12, 2004Inventors: Helen M. Pask, James A. Piper