JPS54118190A - Multi-wavelength band photo detector - Google Patents
Multi-wavelength band photo detectorInfo
- Publication number
- JPS54118190A JPS54118190A JP2579378A JP2579378A JPS54118190A JP S54118190 A JPS54118190 A JP S54118190A JP 2579378 A JP2579378 A JP 2579378A JP 2579378 A JP2579378 A JP 2579378A JP S54118190 A JPS54118190 A JP S54118190A
- Authority
- JP
- Japan
- Prior art keywords
- wavelength band
- layer
- photo detector
- light
- optical signals
- 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
- Light Receiving Elements (AREA)
Abstract
PURPOSE: To draw out the plural optical signals in separation and by one wavelength band by converting the light of one wavelength band into one electric signal via the 1st photo detector and then converting the light of other wavelength band into other electric signal via the 2nd photo detector respectively.
CONSTITUTION: N-type layer 10, P-type layer 11 and N-type layer 12 are grown in lamination on N-type semiconductor substrate 9, and the electrodes are drawn out from substrate 9, layer 11 and 12 each and with application of the voltage to secure the backward bias applied. In this case, the junction interface between layer 10 and 11 is turned previously to the band cap which can absorb the optical signal of the λ2 wavelength band, and at the same time both the gap and the thickness are selected at layer 11 and 12 so that only the optical signal of the λ1 wavelength band is absorbed and the optical signal of λ2 is transmitted through. In such constitution, the separate detection becomes possible the optical signals of λ1 and λ2 at terminal 13 and 14 respectively when the light enters the highest layer 14. Thus, the plural optical signals can be obtained with reduction of the light loss.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2579378A JPS54118190A (en) | 1978-03-06 | 1978-03-06 | Multi-wavelength band photo detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2579378A JPS54118190A (en) | 1978-03-06 | 1978-03-06 | Multi-wavelength band photo detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54118190A true JPS54118190A (en) | 1979-09-13 |
Family
ID=12175704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2579378A Pending JPS54118190A (en) | 1978-03-06 | 1978-03-06 | Multi-wavelength band photo detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54118190A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5516479A (en) * | 1978-07-21 | 1980-02-05 | Sumitomo Electric Ind Ltd | Heterojunction light receiving diode |
-
1978
- 1978-03-06 JP JP2579378A patent/JPS54118190A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5516479A (en) * | 1978-07-21 | 1980-02-05 | Sumitomo Electric Ind Ltd | Heterojunction light receiving diode |
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