JPS6476435A - Optical pickup - Google Patents

Optical pickup

Info

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
Application number
JP62232785A
Other languages
Japanese (ja)
Inventor
Osamu Yokoyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP62232785A priority Critical patent/JPS6476435A/en
Publication of JPS6476435A publication Critical patent/JPS6476435A/en
Pending legal-status Critical Current

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.
JP62232785A 1987-09-17 1987-09-17 Optical pickup Pending JPS6476435A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0715095A (en) * 1993-05-06 1995-01-17 Cselt Spa (Cent Stud E Lab Telecomun) Semiconductor laser by horizontal radiation and connection of the laser to an optical waveguide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0715095A (en) * 1993-05-06 1995-01-17 Cselt Spa (Cent Stud E Lab Telecomun) Semiconductor laser by horizontal radiation and connection of the laser to an optical waveguide

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