Patent EP0168165A1 successfully refreshed from Google Patents.
EP0168165A1
Expired / Lapsed
EP
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Opto-electronic and electro-optic devices
Assignee: British Telecommunications PLC
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Filing: 1985-06-06
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Granted: —
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Expires: 2005-06-06
Abstract
Abstract An opto-electronic or electro-optic device such as a semi-conductor laser having one or both reflective facets carrying an anti-reflection coating being an oxide of Y, Nd, La or preferably Gd.
Inventors
- 👤 William John Devlin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:12
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/028; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
An opto-electronic or electro-optic device having a reflective facet carrying a metal oxide anti-reflection coating, which facet has a reflectivity of no more than 1%, characterised that said metal is selected from Y, Gd, Nd and La.
Claim 2
Dependent Claim
37 words
An opto-electronic or electro-optic device having a reflective facet carrying a metal oxide anti-reflection coating, which facet has a reflectivity of no more than 1%, characterised that said metal is selected from Y, Gd, Nd and La.
Claim 3
Dependent Claim
11 words
A device according to Claim 1, wherein the metal is Gd.
Claim 4
Dependent Claim
22 words
A device according to Claim 1 or Claim 2, in which the reflectivity is no more than 0.1% at the coated facet.
Claim 5
Independent Claim
20 words
A device according to any preceding claim, in which the coating has a refractive index of from 1.7 to 1.95.
Claim 6
Dependent Claim
8 words
A semi-conductor device according to any preceding claim
Claim 7
Dependent Claim
8 words
A laser device according to any preceding claim.
Claim 8
Dependent Claim
17 words
An external cavity device including a device according to any preceding claim, having only one coated facet.
Claim 9
Dependent Claim
17 words
An amplifier including a device according to any of Claims 1 to 7, having two coated facets.
References Cited (Backward Citations)
No citation records indexed.
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