Two-wavelength semiconductor laser diode package for use on the read/write head of an optical drive capable of reading different types of optical discs
US6188132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Apr 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/806
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A two-wavelength laser diode package is provided, which can be utilized in the read/write head of an optical drive capable of reading data from different types of optical discs, such as CD (compact disc), CD-R (CD Recordable) and DVD (digital versatile disc). The laser diode package includes a pair of laser diodes of two different specifications in wavelength, which are disposed on one or two submounts, either horizontally or vertically oriented with each other. Further, a beam coinciding means, such as a micro dichroic prism, a micro dichroic plate, a micro dichroic beam-splitter, or an external dichroic beam-splitter, is used to make the two respective laser beams from the two laser diodes to propagate on the same propagation axis when in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.