US5901259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical waveplate, method of manufacturing the same, and waveguide device using the same
Assignee: NTT Inc
•
Filing: 1997-04-11
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Granted: 1999-05-04
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Expires: 2017-04-11
Abstract
Abstract An optical waveplate includes a polyimide with a film thickness of 20 mu m or less.
Inventors
- 👤 Shinji Ando
- 👤 Takashi Sawada
- 👤 Yasuyuki Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:51
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/12007; G02B6/12009; G02B6/12011; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1039; G02B5/00; G02B5/30; G02B5/3083; G02B6/12023; G02B6/122; G02B6/1221; G02B6/126; G02B6/24; G02B6/26; G02B6/28; G02B6/293; G02B6/29331; G02B6/29335; G02B6/29338; G02B6/29341; G02B6/29346; G02B6/2935; G02B6/29352; G02B2006/12083; G02B2006/12116
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A waveguide device, wherein said waveguide device is a waveguide multi/demultiplexer using an arrayed-waveguide grating in which at least one input waveguide, a first slab waveguide (input side), an arrayed waveguide constituted by a plurality of channel waveguides, a second slab waveguide (output side), and a plurality of output waveguides are arranged in the order named on a waveguide substrate, and a polarization convertor consisting of a polyimide film with a film thickness of not more than 20 μm is arranged in the middle of each of said channel waveguides, which constitute said arrayed waveguide, so as to form a certain angle with said waveguide substrate.
Claim 2
Dependent Claim
106 words
A waveguide device, wherein said waveguide device is a waveguide multi/demultiplexer using an arrayed-waveguide grating in which at least one input waveguide, a first slab waveguide (input side), an arrayed waveguide constituted by a plurality of channel waveguides, a second slab waveguide (output side), and a plurality of output waveguides are arranged in the order named on a waveguide substrate, and a polarization convertor consisting of a polyimide film with a film thickness of not more than 20 μm is arranged in the middle of each of said channel waveguides, which constitute said arrayed waveguide, so as to form a certain angle with said waveguide substrate.
Claim 3
Dependent Claim
16 words
A device according to claim 1, wherein the certain angle is defined between 80° and 90°.
References Cited (Backward Citations)
US5121238A
Cited
EP0424951B1
Cited
EP0454590A2
Cited
JPH04175729A
Cited
JPH04241304A
Cited
US5694496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-05-03 | 2002-11-02 | 2003-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-03 | 2006-11-02 | 2007-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-03 | 2010-11-02 | 2011-05-04 | $7700.00 | Window Closed / Lapsed |