| EPSRC Reference: |
GR/K73527/01 |
| Title: |
THERMALLY STABLE ND-DOPED A1F3-BASED OPTICAL FIBRES FOR AN EFFICIENT DIODE-PUMPED 2ND-WINDOW AMPLIFIER |
| Principal Investigator: |
Payne, Professor Sir DN |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Optoelectronics Research Ctr (closed) |
| Organisation: |
University of Southampton |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 February 1996 |
Ends: |
31 January 1998 |
Value (£): |
84,713
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| EPSRC Research Topic Classifications: |
| Optical Devices & Subsystems |
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Summary on Grant Application Form |
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This is a collaborative research proposal between the Department of Materials Technology at Brunel University ad the Optoelectronics Research Centre at Southampton University. We propose to deliver a laboratory prototype efficient second-telecom 1300nm Nd3+-doped glass fiber amplifier (NDFA) attractive for commercial exploitation. 80% of UK telephone traffic is being carried by optical fibres operating in the second telecom window. The main attraction of an NDFA is that it is particularly capable of producing short amplifiers (2cm) desirable for practical device implementation because of high pump efficiency using 800nm laser diode and high dopant concentrations in ND3+ -doped glass fibres. The development of an efficient NDFA has been prevented by two features, namely in the majority of host glasses, signal excited state absorption (ESA) shifts the peak of the gain curve outside the second telecom window; and the competing 1050nm amplified stimulated emission (ASE) depletes the pump and saturates the gain at 1300nm. The former is more serious and is a materials related problem. in our previous collaboration, theoretical analysis and experimental spectroscopy a the ORC and glass design at Brunel University have resulted in defining the requirements in glass composition necessary to reduce the ESA and effect a blue shift in the gain curve. We have already achieved zero gain at 1305nm and a maximum at 1317nm. In this proposal, the glass composition will be further modified to achieve a shift in the maximum towards 1300nm without sacrificing the glass stability and fiberizability. A number of mechanisms for suppression of ASE will be investigated including co-doping with a suitable absorbing ion and writing in-fibre Bragg grating. All glass production, preform and fibre fabrication, spectroscopy, gain measurements and device implementation necessary to achieve our objectives will be undertaken by the partners.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.soton.ac.uk |