JPH02125363U - - Google Patents
Info
- Publication number
- JPH02125363U JPH02125363U JP3447289U JP3447289U JPH02125363U JP H02125363 U JPH02125363 U JP H02125363U JP 3447289 U JP3447289 U JP 3447289U JP 3447289 U JP3447289 U JP 3447289U JP H02125363 U JPH02125363 U JP H02125363U
- Authority
- JP
- Japan
- Prior art keywords
- output
- semiconductor laser
- converter
- counter
- pll circuit
- 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
- 239000004065 semiconductor Substances 0.000 claims description 7
- 230000004044 response Effects 0.000 claims 1
- 230000002123 temporal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案に係る半導体レーザ装置の一実
施例を示す構成ブロツク図、第２図は第１図装置
の動作を説明するタイムチヤート、第３図は従来
の半導体レーザ装置を示す構成概念図、第４図は
第３図装置の動作を示すタイムチヤートである。
１……発振器、、２……半導体レーザ、４……
ＰＬＬ回路、５……カウンタ、６……メモリ、７
……Ｄ／Ａ変換器。
FIG. 1 is a block diagram showing an embodiment of a semiconductor laser device according to the present invention, FIG. 2 is a time chart explaining the operation of the device shown in FIG. 1, and FIG. 3 is a conceptual diagram showing a conventional semiconductor laser device. 4 are time charts showing the operation of the device shown in FIG. 3. 1... Oscillator, 2... Semiconductor laser, 4...
PLL circuit, 5...Counter, 6...Memory, 7
...D/A converter.
Claims (1)
出力する半導体レーザ装置において、発振器の出
力周波数をｎ倍するＰＬＬ回路と、このＰＬＬ回
路の出力をｎ分周するカウンタと、このカウンタ
の出力でアドレス指定されるメモリと、このメモ
リ出力をＤ／Ａ変換するＤ／Ａ変換器とを備え、
矩形波出力が一定値となる区間における半導体レ
ーザ出力の時間的変化を相殺するようにメモリ内
容を定め、Ｄ／Ａ変換器の出力に対応する電流で
半導体レーザを駆動するように構成したことを特
徴とする半導体レーザ装置。 A semiconductor laser device that outputs light modulated in response to a rectangular wave output from an oscillator includes a PLL circuit that multiplies the output frequency of the oscillator by n, a counter that divides the output of this PLL circuit by n, and an output of this counter. and a D/A converter for D/A converting the memory output,
The memory contents are determined so as to cancel out temporal changes in the semiconductor laser output in a section where the rectangular wave output is constant, and the semiconductor laser is configured to be driven with a current corresponding to the output of the D/A converter. Features of the semiconductor laser device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3447289U JPH02125363U (en) | 1989-03-27 | 1989-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3447289U JPH02125363U (en) | 1989-03-27 | 1989-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125363U true JPH02125363U (en) | 1990-10-16 |
Family
ID=31538968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3447289U Pending JPH02125363U (en) | 1989-03-27 | 1989-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125363U (en) |
-
1989
- 1989-03-27 JP JP3447289U patent/JPH02125363U/ja active Pending
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