Method of fabricating a wavelength division multiplexed (WDM) unit
US6854900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2002 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Apr 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4239
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of fabricating a WDM unit consists of attaching a first and a second GRIN lenses to opposite faces of a WDM filter. A dual fiber pigtail and a single fiber pigtail are mounted in corresponding glass tubes. The glass tube with the dual fiber pigtail and the glass tube with the single fiber pigtail are mounted on the second GRIN lens and the first GRIN lens respectively. The position of the dual fiber pigtail and the single fiber pigtail are adjusted with respect to the second GRIN lens and the first GRIN lens respectively to obtain the best optical property. The invention prevents the WDM filter from tilting during temperature variation by sandwiching the WDM filter in between the two GRIN lenses, and further prevents the WDM unit from increasing the reflection loss and insertion loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.