Method for making optical device with composite passive and tapered active waveguide regions
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 16, 1999
Issued Date -
N/A
app pub date -
Sep 29, 1998
filing date -
Feb 24, 1994
priority date (Note) -
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Abstract
A semiconductor optical device, for example a laser, has a composite optical waveguide including a tapered, MQW active waveguide in optical contact with a substantially planar, passive waveguide. The fundamental optical mode supported by the composite waveguide varies along the length of the composite waveguide so that, in a laser, the laser mode is enlarged and is a better match to single mode optical fibre. A method for making such semiconductor optical devices is also disclosed.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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IPG PHOTONICS CORPORATION | 50 OLD WEBSTER ROAD OXFORD MA 01540 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Lealman, Ian F | Ipswich, GB | 7 | 121 |
# of filed Patents : 7 Total Citations : 121 | |||
Perrin, Simon D | Ipswich, GB | 2 | 54 |
# of filed Patents : 2 Total Citations : 54 | |||
Robertson, Michael J | Ipswich, GB | 10 | 192 |
# of filed Patents : 10 Total Citations : 192 |
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Patent Citation Ranking
- 31 Citation Count
- H01S Class
- 92.41 % this patent is cited more than
- 26 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Aug 04, 1997 | PD | Priority Date |

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