Quasi-phase Matched Optical Parametric Amplification in Gas Filled Hollow Fiber
Abstract
This project was formed in order to investigate the properties of hollow-core optical fibres for optical parametric generation in gases. Phase matching for parametric generation is envisaged to be achieved using a fixed-pitch applied electric field modulation for quasi-phase matching (QPM). For this to be effective over a long length of fibre with many QPM periods the fibre propagation constants need to be very uniform along the fibre length. This requires micron-level stability of the core diameter, placing constraints on the longitudinal stability of the fabricated fibre, both in the size of the deviations and in the length scales over which any deviations occur. This project was to investigate fibre fabrication in the context of improved longitudinal stability and to evaluate the longitudinal uniformity of fibres that were fabricated.The project timing was particularly affected by UK and worldwide restrictions from the COVID-19 pandemic. We were not able to overlap the start of the project with the end of previous projects working on hollow optical fibres of this type. As well as a turnover of researchers, PhD and post-doctoral, there was a challenging recruitment environment for a researcher for this project. We have nevertheless made great progress in improving and understanding of the processes of optical fibre drawing to enable repeatable and uniform fabrication.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 21, 2023
- Accession Number
- AD1222487
Entities
People
- William Wadsworth
Organizations
- University of Bath