Femtosecond Laser Machining of Gallium Arsenide Wafers for the Creation of Quasi-Phasematched Devices
Abstract
This report results from a contract tasking Heriot-Watt University as follows; The project will use femtosecond laser machining to create comb-like micro-structures from GaAs wafers that can be combined to produce a suitably oriented pattern for QPM. Readily available GaAs wafers will be used and the study will concentrate on evaluating; (a) the quality of femtosecond machining possible in GaAs in terms of its repeatability precision and surface finish; (b) the feasibility of aligning two GaAs combs in intimate optical contact; (c) the transmission loss of the composite sample and; (d) second-harmonic generation for a 2.3 micrometer input wavelength from an existing OPO source. The project will utilize a (pound)250k amplified Ti:sapphire laser that has been recently commissioned at Heriot-Watt University. An existing 2.3 micrometer modelocked OPO will be used for optical testing purposes. Funding is requested for GaAs wafers optics a contribution to research / technical staff time and an optical alignment system to permit precise contacting of the GaAs combs. Derryck Reid is the principal investigator, Dr Reid will be supported by a PhD student Mr Stuart Campbell who holds a BSc (Heriot-Watt University) and an MSc in Optoelectronics (St Andrews University) and by a research assistant Mr Euan Ramsay (M.Phys., St Andrews University).
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 21, 2006
- Accession Number
- ADA445840
Entities
People
- Derryck T. Reid
Organizations
- Heriot-Watt University