Patent US4601535A successfully refreshed from Google Patents.
US4601535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical coupling system with intermediate coupling medium
Assignee: Hitachi Ltd
•
Filing: 1985-03-25
•
Granted: 1986-07-22
•
Expires: 2005-03-25
Abstract
Abstract An optical coupling system between a semiconductor laser and an optical fiber is disclosed. The system is characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of the semiconductor laser material is packed between the end surface of a distributed feedback type or distributed Bragg reflector type semiconductor laser and the end surface of an optical fiber.
Inventors
- 👤 Toshiki Tanaka
- 👤 Katsuyuki Imoto
- 👤 Naoki Chinone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:50
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/30; G02B6/305; G02B6/36; G02B6/38; G02B6/3801; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4204; G02B6/4206; G02B6/4212
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed feedback type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing step-wise in the axial direction of optical coupling.
Claim 2
Dependent Claim
80 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed feedback type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing step-wise in the axial direction of optical coupling.
Claim 3
Dependent Claim
80 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed feedback type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing continuously in the axial direction of optical coupling.
Claim 4
Dependent Claim
80 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed feedback type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing continuously in the axial direction of optical coupling.
Claim 5
Dependent Claim
81 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed Bragg reflector type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing step-wise in the axial direction of optical coupling.
Claim 6
Dependent Claim
81 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed Bragg reflector type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing step-wise in the axial direction of optical coupling.
Claim 7
Dependent Claim
81 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed Bragg reflector type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing continuously in the axial direction of optical coupling.
Claim 8
Dependent Claim
81 words
An optical coupling system between a semiconductor laser and an optical fiber characterized in that a medium having a refractive index greater than 1 but smaller than the refractive index of a semiconductor laser material is packed between the end surface of a distributed Bragg reflector type semiconductor laser and the end surface of said optical fiber, the refractive index of said medium packed between said semiconductor laser and said optical fiber changing continuously in the axial direction of optical coupling.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |