Title:
SINGLE-FREQUENCY LASER APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/191593
Kind Code:
A3
Abstract:
A single-frequency laser apparatus comprises a mirror and a volume Bragg grating (VBG) reflector defining a laser cavity therebetween and an optical gain material for emitting and amplifying an intra-cavity beam in the laser cavity. The optical gain material comprises a transition-metal doped crystal such as a crystal doped with transition-metal ions selected from one or more of Ti3+ ions, Cr2+ ions, Cr3+ ions or Cr4+ ions. A reflectivity spectrum of the VBG reflector and an optical length of the laser cavity are selected so that a beam output from the laser cavity is a single-frequency output beam and/or includes only one longitudinal mode of the laser cavity. The laser apparatus may provide a robust, compact, low cost, high-power wavelength adjustable (from approximately 650 to 950 nm), narrow linewidth (<100 kHz), single frequency laser source which is suitable for a wide range of applications from laser sensing, spectroscopy, and high precision frequency metrology sectors.
Inventors:
LAGATSKY ALEXANDER (GB)
MCKNIGHT LOYD (GB)
STOTHARD DAVID (GB)
MCKNIGHT LOYD (GB)
STOTHARD DAVID (GB)
Application Number:
PCT/GB2021/050701
Publication Date:
November 04, 2021
Filing Date:
March 22, 2021
Export Citation:
Assignee:
FRAUNHOFER UK RES LTD (GB)
International Classes:
H01S3/08; H01S3/0941; H01S3/1055; H01S3/139; H01S3/16; H01S3/04; H01S3/06; H01S3/094; H01S3/107; H01S3/131; H01S3/137
Domestic Patent References:
| WO2008153488A1 | 2008-12-18 | |||
| WO2009079730A2 | 2009-07-02 |
Foreign References:
| US20170104308A1 | 2017-04-13 | |||
| US20050018743A1 | 2005-01-27 |
Other References:
CHUNG TE-YUAN ET AL: "Volume Bragg Grating-Based 70 nm Tunable and Narrow Output Spectra from a Ti:sapphire Laser", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 50, no. 9, 20 September 2011 (2011-09-20), JP, pages 092701, XP055813354, ISSN: 0021-4922, DOI: 10.1143/JJAP.50.092701
HEMMER MICHAËL ET AL: "Volume Bragg Grating assisted broadband tunability and spectral narrowing of Ti:Sapphire oscillators", OPTICS EXPRESS, vol. 17, no. 10, 30 April 2009 (2009-04-30), pages 8212 - 8219, XP055813192
RYASNYANSKIY A. ET AL: "DBR and DFB lasers in neodymium- and ytterbium-doped photothermorefractive glasses", OPTICS LETTERS, vol. 39, no. 7, 31 March 2014 (2014-03-31), US, pages 2156, XP055844399, ISSN: 0146-9592, DOI: 10.1364/OL.39.002156
FIBRICH MARTIN ET AL: "Alexandrite microchip lasers", OPTICS EXPRESS, vol. 27, no. 12, 3 June 2019 (2019-06-03), pages 16975, XP055813167, DOI: 10.1364/OE.27.016975
HEMMER MICHAËL ET AL: "Volume Bragg Grating assisted broadband tunability and spectral narrowing of Ti:Sapphire oscillators", OPTICS EXPRESS, vol. 17, no. 10, 30 April 2009 (2009-04-30), pages 8212 - 8219, XP055813192
RYASNYANSKIY A. ET AL: "DBR and DFB lasers in neodymium- and ytterbium-doped photothermorefractive glasses", OPTICS LETTERS, vol. 39, no. 7, 31 March 2014 (2014-03-31), US, pages 2156, XP055844399, ISSN: 0146-9592, DOI: 10.1364/OL.39.002156
FIBRICH MARTIN ET AL: "Alexandrite microchip lasers", OPTICS EXPRESS, vol. 27, no. 12, 3 June 2019 (2019-06-03), pages 16975, XP055813167, DOI: 10.1364/OE.27.016975
Attorney, Agent or Firm:
MARKS & CLERK LLP (GB)
Download PDF:
Previous Patent: NEW USE OF ANGIOTENSIN II TYPE 2 RECEPTOR AGONIST
Next Patent: AN ELECTRONIC LOCKING DEVICE
Next Patent: AN ELECTRONIC LOCKING DEVICE