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Title:
APPARATUS FOR PROVIDING OPTICAL RADIATION
Document Type and Number:
WIPO Patent Application WO/2019/102174
Kind Code:
A3
Abstract:
Apparatus for providing optical radiation (15), which apparatus comprises an optical input (13), a coupler (2), a first semiconductor amplifier (3), a controller (4), a preamplifier (61), a power amplifier (62) and an output fibre (5), wherein: the optical input (13) is for receiving input optical radiation (14); the optical input (13) is connected in series to the coupler (2), the first semiconductor amplifier (3), the preamplifier (61), the power amplifier (62), and the output fibre (5); the apparatus being characterized in that: the first semiconductor amplifier (3) comprises a waveguide (6) having a low reflecting facet (8); the first semiconductor amplifier (3) is in a double pass configuration such that the low reflecting facet (8) is connected to both the optical input (13) and the preamplifier (61) via the coupler (2); and the controller (4) is configured to cause the waveguide (6) of the first semiconductor amplifier (3) to operate in saturation thereby enabling the first semiconductor amplifier (3) to reduce non-linear effects in the preamplifier (61), the power amplifier (62), and the output fibre (5).

Inventors:
ALMEIDA PAULO (GB)
CODEMARD CHRISTOPHE ANDRE (GB)
DURKIN MICHAEL KEVAN (GB)
Application Number:
GB2018/000149
Publication Date:
June 20, 2019
Filing Date:
November 23, 2018
Export Citation:
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Assignee:
SPI LASERS UK LTD (GB)
International Classes:
H01S3/23
Domestic Patent References:
WO1993018561A11993-09-16
Foreign References:
US6674969B12004-01-06
US6151338A2000-11-21
US20080018988A12008-01-24
Attorney, Agent or Firm:
JONES, Graham Henry (Graham Jones & Co, 77 Beaconsfield RoadBlackheath, London SE3 7LG, GB)
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