JPS6476435A - Optical pickup - Google Patents
Optical pickupInfo
- Publication number
- JPS6476435A JPS6476435A JP62232785A JP23278587A JPS6476435A JP S6476435 A JPS6476435 A JP S6476435A JP 62232785 A JP62232785 A JP 62232785A JP 23278587 A JP23278587 A JP 23278587A JP S6476435 A JPS6476435 A JP S6476435A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- type layer
- diode
- light
- grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Optical Head (AREA)
- Semiconductor Lasers (AREA)
Abstract
PURPOSE:To enable the use of a grating which is easy to produce and has a long period by using a photodetector consisting of an amorphous thin film essentially consisting of Si to emit the light to the side of a transparent substrate. CONSTITUTION:A photo diode 12 where p-type layer 21, an i-type layer 22, and an n-type layer 22 consisting of an amorphous thin film essentially consisting of Si are formed between electrodes 20 and 24 is provided on a waveguide 11 consisting of a glass on a quartz substrate 10. The light from a semiconductor laser 15 is made incident on the end face of the waveguide 11 and is emitted to the side of the substrate 10 through a grating beam splitter 13 and a condensing grating coupler 14 and is condensed at a point 18. A reflected light 26 from a recording medium at a point 18 is returned to the waveguide 11 and is divided into two by the splitter 13 and is led to the diode 12. The diode 12 detects not only the signal of the medium but also a focusing error signal and a tracking error signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232785A JPS6476435A (en) | 1987-09-17 | 1987-09-17 | Optical pickup |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232785A JPS6476435A (en) | 1987-09-17 | 1987-09-17 | Optical pickup |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6476435A true JPS6476435A (en) | 1989-03-22 |
Family
ID=16944704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62232785A Pending JPS6476435A (en) | 1987-09-17 | 1987-09-17 | Optical pickup |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6476435A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0715095A (en) * | 1993-05-06 | 1995-01-17 | Cselt Spa (Cent Stud E Lab Telecomun) | Horizontally radiated semiconductor laser and connection of such laser to optical waveguide |
-
1987
- 1987-09-17 JP JP62232785A patent/JPS6476435A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0715095A (en) * | 1993-05-06 | 1995-01-17 | Cselt Spa (Cent Stud E Lab Telecomun) | Horizontally radiated semiconductor laser and connection of such laser to optical waveguide |
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