EP0170313A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electro-optical device comprising a laser diode, an input transmission fibre and an output transmission fibre
Assignee: Koninklijke Philips NV
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Filing: 1985-07-03
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Granted: —
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Expires: 2005-07-03
Abstract
Abstract An electro-optical device is described which comprises a semiconductor laser (LD2) to which a plurality of optical transmission fibres (SMF1, SMF2) are coupled. By combining an input transmission fibre (SMF1) and at least one output transmission fibre (SMF2) to form a tapered common fibre end portion whose transverse dimension is of the order of that of a single transmission fibre and by coupling this end portion to one radiation-emitting surface of the semiconductor laser, a standard laser package may be employed and several new uses becime feasible in practice.
Inventors
- 👤 Giok Djan Khoe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 11:30
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/26; G02B6/28; G02B6/2804; G02B6/2856; G02B6/4201; G02B6/4202; G02B6/4203; G02B6/4219; G02B6/4236; G02B6/424; G02B6/4245; G02B6/4266; G02B6/4268; G02B6/4269; G02B6/4286
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
An electro-optical device comprising a semiconductor laser, a first radiation path, which terminates at the semiconductor laser, for applying an optical signal by means of which a parameter of the laser radiation can be influenced, and a second radiation path, which also terminates at the semiconductor laser, for taking off the laser radiation, characterized in that the radiation paths comprise single-mode transmission fibres, the single-mode input transmission fibre and at least one single-mode output transmission fibre are coupled to the same radiation-emitting surface of the semiconductor laser, the transmission-fibre ends which face said surface constitute a composite fibre with a tapered end portion, and the end face of the composite transmission fibre has been provided with a transparent material with a spherical surface.
Claim 2
Dependent Claim
123 words
An electro-optical device comprising a semiconductor laser, a first radiation path, which terminates at the semiconductor laser, for applying an optical signal by means of which a parameter of the laser radiation can be influenced, and a second radiation path, which also terminates at the semiconductor laser, for taking off the laser radiation, characterized in that the radiation paths comprise single-mode transmission fibres, the single-mode input transmission fibre and at least one single-mode output transmission fibre are coupled to the same radiation-emitting surface of the semiconductor laser, the transmission-fibre ends which face said surface constitute a composite fibre with a tapered end portion, and the end face of the composite transmission fibre has been provided with a transparent material with a spherical surface.
Claim 3
Dependent Claim
40 words
An electro-optical device as claimed in Claim 1, characterized in that the material of the spherical body on the end face of the transmission fibre has a refractive index which is substantially higher than that of the transmission-fibre core material.
Claim 4
Dependent Claim
54 words
An electro-optical device as claimed in Claim 1, characterized in that the material of the spherical body on the end face of the transmission fibre has a melting temperature which is lower than those of the transmission fibre materials and has a refractive index which is substantially equal to that of the core material.
Claim 5
Dependent Claim
26 words
An electro-optical device as claimed in Claim 1, 2 or 3,, characterized in that the single-mode input transmission fibre is coupled to a second semiconductor laser.
Claim 6
Dependent Claim
27 words
An electro-optical device as claimed in Claim 1, 2 or 3, characterized in that the single-mode input transmission fibre is coupled to a wavelengt selective reflecting element.
Claim 7
Dependent Claim
41 words
An electro-optical device as claimed in Claim 1, 2 or 3, characterized in that at least two single-mode transmission fibres are coupled to the same radiation-emitting surface of a semiconductor laser, which fibres may be coupled to optical transmitters or receivers.
Claim 8
Dependent Claim
29 words
An electro-optical device as claimed in Claim 1, 2, 3, 4, 5 or 6, characterized in that one of the output transmission fibres is coupled to a radiation-sensitive detector.
References Cited (Backward Citations)
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