Areas of Research
The Zepler Institute at The University of Southampton provides a unique range of photonics and nanoelectronics fabrication capabilities whilst being home to one of Europe’s premier cleanrooms.
Dr Xu’s research and contribution are at the forefront in the field of high-power fiber lasers for materials processing, mid-infrared lasers for chemical sensing and fiber amplifiers for telecommunications.
The Use of Covesion PPLN Technology
Dr Xu and the team at the ORC have used Covesion’s PPLN crystals for nonlinear frequency conversion, to convert near infrared lasers to visible and mid-infrared regions for specific research applications.
For example, Covesion’s frequency doubling PPLN crystal has been demonstrated to provide very high conversion efficiency (up to 75%) in the visible wavelength, Applied Physics B: Lasers and Optics, 124 (4), 1-6.
In addition, ultrashort pulse (<100fs) at 2.4µm wavelength with high beam quality was generated from Covesion’s thin-PPLN based optical parametric oscillator, Applied Physics B, 117 (4), 987–993. µJ-level high-energy picosecond pulses in the mid-infrared region have been achieved through optical parametric devices by using Covesion’s 40mm PPLN crystals, Optics Express, 23 (10), 12613-12618; Optics Letters, 40 (14), 3288- 3291.
The PPLN product has also been used for biomedical research and offers outstanding performance, Optics Express, 12(2), 1010-1019. Furthermore, they are employing Covesion’s state-of-the-art PPLN waveguides in the research of optical parametric processes for use in the application of telecommunications
Why Covesion?
“Compared to some other nonlinear mediums, Covesion’s PPLN product provides much higher non-linear coefficient and good optical qualities that are suitable for high power laser applications.
Covesion has good reputation in the community, they provide good quality products as well as excellent technical support for the materials and technologies used in our laser system. They offer a range of standard in-stock products, together with providing bespoke products and customised services.”
Dr. Lin Xu, Senior Research Fellow, Optoelectronics Research Centre (ORC), University of Southampton
