EPSRC logo

Details of Grant 

EPSRC Reference: GR/L35348/01
Title: FAST SCANNING BEAM LIDAR SOURCES 'SCANBEAM'
Principal Investigator: Marsh, Professor JH
Other Investigators:
Coleman, Professor A Arnold, Professor J De La Rue, Honorary Professor R
Researcher Co-Investigators:
Project Partners:
Bookham Technology Plc QinetiQ
Department: Electronics and Electrical Engineering
Organisation: University of Glasgow
Scheme: Standard Research (Pre-FEC)
Starts: 21 April 1997 Ends: 20 October 2000 Value (£): 215,745
EPSRC Research Topic Classifications:
Optical Devices & Subsystems Optoelect. Devices & Circuits
EPSRC Industrial Sector Classifications:
Aerospace, Defence and Marine
Related Grants:
Panel History:  
Summary on Grant Application Form
A laser with a steerable output beam, for use as the head in a LIDAR system, will be constructed. A Fabry-Perot laser will feed a multi-mode interference coupler which will split the beam into up to 30 single mode ridge waveguides. Each waveguide will contain an independently controlled electric-optic modulator, making it possible to control the phase of the beam from each waveguide and the direction of the output beam from the facet at the end of the waveguides. The laser will have a target output power of 100mW with a linewidth of 1.5mhz. Since the linewidth in standard devices started to broaden above 10 to 30 mW, novel devices with a large optical mode will be made to reduce the peak intensity and, hence, nonlinear behaviour leading to linewidth rebroadening. A relatively thick waveguide core will reduce the peak intensity and an extended passive cavity, integrated using quantum well intermixing within the laser section, will increase the cavity lifetime and reduce the linewidth. To achieve 100mW it may be necessary to integrate the laser with an optical amplifier. Intermixing will also be used in order to realise low losses in the beam steering sections of the device.
Key Findings
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
Potential use in non-academic contexts
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
Impacts
Description This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
Summary
Date Materialised
Sectors submitted by the Researcher
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
Project URL:  
Further Information:  
Organisation Website: http://www.gla.ac.uk