Patent EP0419059A1 successfully refreshed from Google Patents.
EP0419059A1
Expired / Lapsed
EP
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Laser source
Assignee: Nortel Networks Ltd
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Filing: 1990-08-28
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Granted: —
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Expires: 2010-08-28
Abstract
Abstract An hybrid laser source has a ring structure including the optical path in a semiconductor amplifier chip(1) and optical fibres (2, 3 and 4). The fibre (2) is rare-earth doped and provides an additional gain medium in the ring, the chip providing its own gain medium. The two gain media are interactive and when the chip input current is-modulated the source produces relatively high peak power ultrashort pulses.
Inventors
- 👤 Robert Anthony Baker
- 👤 Wilson Prof. Sibbett
- 👤 David Burns
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:56
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1106; H01S3/1109; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06791; H01S3/106; H01S3/107; H01S3/09; H01S3/091; H01S3/094; H01S3/094038; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1608
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
60 words
An hybrid laser source characterised by a semiconductor diode amplifier chip (1) and a length of rare-earth-doped single mode optical fibre (2), the optical path within the chip (1) forming part of a ring and another part of the ring being comprised by said fibre (2), which fibre (2) provides an external cavity having distributed gain for the chip (1).
Claim 2
Dependent Claim
60 words
An hybrid laser source characterised by a semiconductor diode amplifier chip (1) and a length of rare-earth-doped single mode optical fibre (2), the optical path within the chip (1) forming part of a ring and another part of the ring being comprised by said fibre (2), which fibre (2) provides an external cavity having distributed gain for the chip (1).
Claim 3
Dependent Claim
21 words
A hybrid laser source as claimed in claim 1 and characterised by means (7) for optically pumping the rare-earth-doped fibre (2).
Claim 4
Dependent Claim
79 words
An hybrid laser source as claimed in claim 2, characterised in that the ring includes two lengths of single mode optical fibre (3, 4) between which the chip (1) is disposed, and optical couplers (5, 6) by means of which the ring is completed, the optical pumping means (7) can be coupled to one end of the rare-earth-doped optical fibre (2) and the laser source output can be taken from the other end of the rare-earth-doped optical fibre (2).
Claim 5
Dependent Claim
20 words
An hybrid laser source as claimed in any one of the preceding claims characterised in that the rare-earth is erbium.
Claim 6
Dependent Claim
24 words
An hybrid laser source as claimed in any one of the preceding claims characterised in that the chip (1) is an InGaAsP amplifier chip.
Claim 7
Dependent Claim
28 words
An hybrid laser source as claimed in claim 2 or claim 3 characterised in that the optical pumping means (7) is comprised by a strained-layer semiconductor diode laser.
References Cited (Backward Citations)
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