Patents Assigned to M SQUARED LASERS LIMITED
  • Patent number: 10416036
    Abstract: An apparatus and a method monitor fluid loss from one or more casks during a maturation process. The apparatus comprises a multi-pass absorption cell arranged in fluid communication with one or more fluid conduits, a pump and a monitoring system. The pump and fluid conduits transport a fluid sample (e.g. vapor sample) from a perimeter of the one or more casks to the multi-pass absorption cell. The monitoring system detects and identifies fluid within the multi-pass absorption cell.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: September 17, 2019
    Assignee: M Squared Lasers Limited
    Inventors: Gareth Thomas Maker, Graeme Peter Alexander Malcolm, John Nicholls
  • Patent number: 9709438
    Abstract: An M2 value beam profiling apparatus and method is described. The M2 value beam profiler comprises an optical axis defined by a focussing lens assembly and a detector, wherein the focussing lens acts to create an artificial waist within an optical field propagating along the optical axis. The beam profiler also comprises a multiple blade assembly having a first set of blades located at an artificial waist position and a second set of blades longitudinally separated along the optical axis from the artificial waist position. The multiple blade assembly therefore provides a means for selectively passing the blades through the location of the optical axis. Employing these measured widths allows for the M2 value of the optical field to be determined.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: July 18, 2017
    Assignee: M SQUARED LASERS LIMITED
    Inventor: Gordon Robertson
  • Patent number: 9478932
    Abstract: A tunable reference cavity (3) with two independently controllable mirrors (15, 16) is disclosed. The mirrors are mounted on respective piezoelectric crystals (18, 19) so that thermal expansion of the piezoelectric crystals moves the cavity mirrors in the same direction along a longitudinal axis of the reference cavity thereby reducing a change of the cavity length. Also disclosed is a system for locking and scanning the output of a laser cavity (2). An error signal is generated between an output of the laser cavity (28) and the transmission (28) of the laser through the external reference cavity (3). A dual piezo-actuated mirror (6b) permits processing of the error signal (26) with separate signal processing circuits (29a, 29b) used to provide an electrical feedback signal to the dual piezoelectric crystal (22, 23b).
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: October 25, 2016
    Assignee: M SQUARED LASERS LIMITED
    Inventor: Gareth Thomas Maker
  • Patent number: 9383314
    Abstract: The invention provides an apparatus and a method that reduces fluid loss from a cask during a maturation process by sealably enclosing the cask in a vessel that provides an expansion volume to receive fluid vapor from the cask, a monitoring system and a method that monitors fluid loss from a cask during a maturation process using a light source and a detector to determine the presence of fluid vapor in the vicinity of the cask, a corresponding system for controlling a maturation process in which environmental conditions are controlled, and a cask leak testing system and method making use of the above.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: July 5, 2016
    Assignee: M SQUARED LASERS LIMITED
    Inventors: Graeme P. Malcolm, Gareth T. Maker, Gordon Robertson
  • Patent number: 9083145
    Abstract: A system and method that can be employed to lock and scan the output of a laser cavity (2) is described. The system and method involves the use of a signal generator for generating an error signal between an output of the laser cavity (28) and the transmission (28) of the laser through a tunable external reference cavity (3). A dual piezo-actuated mirror (6b) permits processing of the error signal (26) with separate signal processing circuits (29a, 29b) used to provide an electrical feedback signal to the two piezo-electric crystals (22, 23b). When incorporated within a laser cavity the described system and methodology can be used to lock and scan the output of the laser cavity while providing the laser output with a reduced linewidth.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: July 14, 2015
    Assignee: M SQUARED LASERS LIMITED
    Inventor: William Miller
  • Publication number: 20150146750
    Abstract: A system and method that can be employed to lock and scan the output of a laser cavity (2) is described. The system and method involves the use of a signal generator for generating an error signal between an output of the laser cavity (28) and the transmission (28) of the laser through a tunable external reference cavity (3). A dual piezo-actuated mirror (6b) permits processing of the error signal (26) with separate signal processing circuits (29a, 29b) used to provide an electrical feedback signal to the two piezo electric crystals (22, 23b). When incorporated within a laser cavity the described system and methodology can be used to lock and scan the output of the laser cavity while providing the laser output with a reduced linewidth.
    Type: Application
    Filed: May 22, 2013
    Publication date: May 28, 2015
    Applicant: M Squared Lasers Limited
    Inventor: William Miller
  • Publication number: 20150146747
    Abstract: A tunable reference cavity (3) with two independently controllable mirrors (15, 16) is disclosed. The mirrors are mounted on respective piezoelectric crystals (18, 19) so that thermal expansion of the piezoelectric crystals moves the cavity mirrors in the same direction along a longitudinal axis of the reference cavity thereby reducing a change of the cavity length. Also disclosed is a system for locking and scanning the output of a laser cavity (2). An error signal is generated between an output of the laser cavity (28) and the transmission (28) of the laser through the external reference cavity (3). A dual piezo-actuated mirror (6b) permits processing of the error signal (26) with separate signal processing circuits (29a, 29b) used to provide an electrical feedback signal to the dual piezoelectric crystal (22, 23b).
    Type: Application
    Filed: May 22, 2013
    Publication date: May 28, 2015
    Applicant: M SQUARED LASERS LIMITED
    Inventor: Gareth Thomas Maker
  • Publication number: 20140160465
    Abstract: The invention provides an apparatus and a method that reduces fluid loss from a cask during a maturation process by sealably enclosing the cask in a vessel that provides an expansion volume to receive fluid vapour from the cask, a monitoring system and a method that monitors fluid loss from a cask during a maturation process using a light source and a detector to determine the presence of fluid vapour in the vicinity of the cask, a corresponding system for controlling a maturation process in which environmental conditions are controlled, and a cask leak testing system and method making use of the above.
    Type: Application
    Filed: July 10, 2012
    Publication date: June 12, 2014
    Applicant: M SQUARED LASERS LIMITED
    Inventors: Graeme Peter Alexander Malcolm, Gareth T. Maker, Gordon Robertson