JPH01141431U - - Google Patents
Info
- Publication number
- JPH01141431U JPH01141431U JP3800588U JP3800588U JPH01141431U JP H01141431 U JPH01141431 U JP H01141431U JP 3800588 U JP3800588 U JP 3800588U JP 3800588 U JP3800588 U JP 3800588U JP H01141431 U JPH01141431 U JP H01141431U
- Authority
- JP
- Japan
- Prior art keywords
- light
- order diffracted
- diffracted light
- lens
- receiving element
- 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
- 230000003287 optical effect Effects 0.000 claims 3
- 238000001228 spectrum Methods 0.000 claims 1
- 230000003111 delayed effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Communication System (AREA)
- Spectrometry And Color Measurement (AREA)
Description
第１図は本考案に係る遅延自己ヘテロダイン装
置の一実施例を示す構成ブロツク図、第２図は第
１図装置の一部を示す要部拡大図、第３図は従来
の遅延自己ヘテロダイン装置の一例を示す構成ブ
ロツク図、第４図は第３図装置の欠点を補つた遅
延自己ヘテロダイン装置の第２の従来例を示す構
成ブロツク図である。
７…超音波光変調器、９ｂ…１次回折光、１０
ｂ…０次回折光、１３…遅延手段、１６…受光素
子、２４…レンズ。
FIG. 1 is a configuration block diagram showing an embodiment of the delayed self-heterodyne device according to the present invention, FIG. 2 is an enlarged view of a main part showing a part of the device shown in FIG. 1, and FIG. 3 is a conventional delayed self-heterodyne device. FIG. 4 is a block diagram showing a second conventional example of a delayed self-heterodyne device that compensates for the drawbacks of the device shown in FIG. 3. 7...Ultrasonic light modulator, 9b...1st order diffracted light, 10
b...0th order diffracted light, 13...delay means, 16...light receiving element, 24...lens.
Claims (1)
器と、この超音波光変調器の０次回折光と１次回
折光とを入射するレンズと、このレンズにより集
光する前記０次回折光と前記１次回折光の一方に
遅延を与える遅延手段と、この遅延手段の出力光
および前記レンズにより集光する前記０次回折光
と前記１次回折光の他方とが干渉して生じる光ビ
ート信号を電気信号に変換する受光素子とを備え
、受光素子の電気信号に基づいて被測定光の周波
数スペクトル特性を測定するように構成したこと
を特徴とする遅延自己ヘテロダイン装置。 an ultrasonic optical modulator that applies a frequency shift to the light to be measured; a lens into which the 0th-order diffracted light and the 1st-order diffracted light of the ultrasonic optical modulator are incident; and the 0th-order diffracted light and the 1st-order diffracted light that are focused by the lens; A delay means for delaying one of the diffracted lights, and an optical beat signal generated by interference between the output light of the delay means and the other of the 0th-order diffracted light and the 1st-order diffracted light condensed by the lens is converted into an electrical signal. 1. A delay self-heterodyne device comprising a light receiving element and configured to measure frequency spectrum characteristics of light to be measured based on an electrical signal from the light receiving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3800588U JPH01141431U (en) | 1988-03-23 | 1988-03-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3800588U JPH01141431U (en) | 1988-03-23 | 1988-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01141431U true JPH01141431U (en) | 1989-09-28 |
Family
ID=31264575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3800588U Pending JPH01141431U (en) | 1988-03-23 | 1988-03-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01141431U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54153652A (en) * | 1978-05-24 | 1979-12-04 | Mitsubishi Electric Corp | Optical branching filter |
| JPS62194423A (en) * | 1986-02-20 | 1987-08-26 | Fujitsu Ltd | Apparatus for measuring width of laser beam |
-
1988
- 1988-03-23 JP JP3800588U patent/JPH01141431U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54153652A (en) * | 1978-05-24 | 1979-12-04 | Mitsubishi Electric Corp | Optical branching filter |
| JPS62194423A (en) * | 1986-02-20 | 1987-08-26 | Fujitsu Ltd | Apparatus for measuring width of laser beam |
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