CN103682980A - Output control method for laser signals - Google Patents
Output control method for laser signals Download PDFInfo
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- CN103682980A CN103682980A CN201310695095.9A CN201310695095A CN103682980A CN 103682980 A CN103682980 A CN 103682980A CN 201310695095 A CN201310695095 A CN 201310695095A CN 103682980 A CN103682980 A CN 103682980A
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- laser
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- chipset
- backlight
- detection chip
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Abstract
The invention provides an optical structure. The optical structure comprises two laser chipsets and a polarization wave combiner, the two laser chipsets are a first laser chipset and a second laser chipset respectively, the first laser chipset and the second laser chipset respectively comprise a plurality of laser chips, and the polarization direction of polarized light output by the laser chips of the first laser chipset is perpendicular to the polarization direction of polarized light output by the laser chips of the second laser chipset. The polarization wave combiner is arranged in the intersected position of polarized light output by a single laser chip in the first laser chipset and polarized light output by a single laser chip in the second laser chipset. The optical structure further comprises an output lens, and after the output lens is arranged on the light path, light rays output by the polarization wave combiner are focused and transmitted to output optical fibers. According to the optical structure, the integration degree of the laser chips is improved, and meanwhile the conversion efficiency and the service life of a laser are guaranteed.
Description
Technical field
The invention belongs to laser field, particularly the output control method of laser signal.
Background technology
Existing laser signal emitter as shown in Figure 1.Wherein, LD is the laser that sends light signal, and the laser signal quality of this laser transmitting depends on I
mODelectric current and I
bIASelectric current, and I wherein
bIASelectric current has determined the average power size of output optical signal, I
mODelectric current has determined the size of output optical signal modulation amplitude.
When circuit sends laser signal as shown in Figure 1, can there is following defect: in the time of debugging output optical signal, because needs meet light signal average power and two parameters of optical signal modulation amplitude simultaneously, so I
mODelectric current and I
bIASelectric current need to be debugged simultaneously, is difficult to find a balance point between two parameters, makes the light signal of output steady and audible.Meanwhile, due to the temperature characterisitic of laser LD itself,, along with the variation of temperature, the luminescent properties of laser LD also changes.In order to guarantee that light signal can be stablized output in the larger situation of temperature change amplitude, export the I of a plurality of corresponding temperatures
mODelectric current and I
bIASelectric current, so the light signal of LD stable output under total temperature has very large difficulty.
Summary of the invention
For balance I
mODelectric current and I
bIASelectric current, stable laser signal is exported problem, the invention provides a kind of output control method of laser signal.
Another object of the present invention is, the light signal of stable output under total temperature.
The invention provides a kind of output control method of laser signal, wherein, the output device of laser signal comprises laser and detection chip backlight, detection chip backlight one end and laser electrically connect, and the other end is linked to the central control unit of circuit; The output control method of laser signal comprises the following steps: first, the luminous power of detection chip monitoring laser backlight, produces feedback current according to the change of luminous power; Secondly, detection chip transmission feedback current backlight is to central control unit; Finally, central control unit is according to feedback current I
mDjudge the luminous power of laser, according to the luminous power of laser to I
bAISelectric current regulates.
Compared with prior art, advantage and the good effect of the output control method of laser signal of the present invention are: first, central control unit CPU is according to feedback current I
mDautomatically regulate I
bIASelectric current, thus when debugging light signal, only need to regulate I
mODelectric current, has simplified debud mode; Secondly, because the temperature characterisitic of detection chip MPD backlight is more stable than laser LD, and the temperature characteristics of detection chip MPD backlight is more level and smooth, therefore, passes through I
mDthe luminous power of current monitoring laser LD under different temperatures, and pass through I
mDfeed back to after central control unit CPU does analyzing and processing and regulate I
bIASelectric current, can more accurately and simple guarantee the power of light signal at all temperature and stablize, and realizes the stable output of laser signal.
Accompanying drawing explanation
Fig. 1 is existing laser signal emitter circuit diagram.
Fig. 2 is laser signal emitter circuit diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done further and described in detail.
2 is known with reference to the accompanying drawings, the output device of laser signal of the present invention comprises laser LD and detection chip MPD backlight, wherein detection chip MPD backlight one end and laser LD electrically connect, the other end is linked to respectively the central control unit CPU of circuit and passes through capacitor C
mDwith GND electrically connect.
The output control method of laser signal comprises the following steps: first, the luminous power of detection chip MPD monitoring laser LD backlight, produces feedback current I according to the change of LD luminous power
mD; Secondly, detection chip MPD transmission feedback current I backlight
mDto central control unit CPU; Finally, central control unit CPU is according to feedback current I
mDjudge the luminous power of laser LD, according to the luminous power of laser LD to I
bAISelectric current regulates.
Compared with prior art, advantage and the good effect of the output control method of laser signal of the present invention are: first, central control unit CPU is according to feedback current I
mDautomatically regulate I
bIASelectric current, thus when debugging light signal, only need to regulate I
mODelectric current, has simplified debud mode; Secondly, because the temperature characterisitic of detection chip MPD backlight is more stable than laser LD, and the temperature characteristics of detection chip MPD backlight is more level and smooth, therefore, passes through I
mDthe luminous power of current monitoring laser LD under different temperatures, and pass through I
mDfeed back to after central control unit CPU does analyzing and processing and regulate I
bIASelectric current, can more accurately and simple guarantee the power of light signal at all temperature and stablize, and realizes the stable output of laser signal.
The above, be only most preferred embodiment of the present invention, and not for limiting the scope of the invention, all equivalences of doing according to the present patent application the scope of the claims change or modify, and are all the present invention and contain.
Claims (2)
1. the output control method of laser signal, wherein, the output device of laser signal comprises laser and detection chip backlight, detection chip backlight one end and laser electrically connect, the other end is linked to the central control unit of circuit; It is characterized in that: the output control method of laser signal comprises the following steps: first, the luminous power of detection chip monitoring laser backlight, produces feedback current according to the change of luminous power; Secondly, detection chip transmission feedback current backlight is to central control unit; Finally, central control unit is according to feedback current I
mDjudge the luminous power of laser, according to the luminous power of laser to I
bAISelectric current regulates.
2. the output control method of laser signal as claimed in claim 1, is characterized in that: the detection chip other end backlight is linked to respectively the central control unit of circuit and by electric capacity and GND electrically connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310695095.9A CN103682980A (en) | 2013-12-17 | 2013-12-17 | Output control method for laser signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310695095.9A CN103682980A (en) | 2013-12-17 | 2013-12-17 | Output control method for laser signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103682980A true CN103682980A (en) | 2014-03-26 |
Family
ID=50319680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310695095.9A Pending CN103682980A (en) | 2013-12-17 | 2013-12-17 | Output control method for laser signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103682980A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113242642A (en) * | 2021-03-30 | 2021-08-10 | 武汉英飞光创科技有限公司 | Backlight monitoring structure for optical module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199943A (en) * | 1997-05-12 | 1998-11-25 | 美国电报电话公司 | Current control for analog optical link |
| CN1280362A (en) * | 1999-07-09 | 2001-01-17 | 索尼公司 | Laser power control device, optic head and optic recording and/or reproducing device |
| JP3238648B2 (en) * | 1997-08-27 | 2001-12-17 | 旭光学工業株式会社 | Light intensity control device and light intensity control method |
| CN1717849A (en) * | 2003-05-13 | 2006-01-04 | 日本电信电话株式会社 | Optical module and its wavelength monitor control method |
| CN101924324A (en) * | 2010-09-07 | 2010-12-22 | 凯钰科技股份有限公司 | Automatic power control circuit for controlling bias current of laser diode |
-
2013
- 2013-12-17 CN CN201310695095.9A patent/CN103682980A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199943A (en) * | 1997-05-12 | 1998-11-25 | 美国电报电话公司 | Current control for analog optical link |
| JP3238648B2 (en) * | 1997-08-27 | 2001-12-17 | 旭光学工業株式会社 | Light intensity control device and light intensity control method |
| CN1280362A (en) * | 1999-07-09 | 2001-01-17 | 索尼公司 | Laser power control device, optic head and optic recording and/or reproducing device |
| CN1717849A (en) * | 2003-05-13 | 2006-01-04 | 日本电信电话株式会社 | Optical module and its wavelength monitor control method |
| CN101924324A (en) * | 2010-09-07 | 2010-12-22 | 凯钰科技股份有限公司 | Automatic power control circuit for controlling bias current of laser diode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113242642A (en) * | 2021-03-30 | 2021-08-10 | 武汉英飞光创科技有限公司 | Backlight monitoring structure for optical module |
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Application publication date: 20140326 |
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