CN103187681A - Light emitting device - Google Patents
Light emitting device Download PDFInfo
- Publication number
- CN103187681A CN103187681A CN201110454587XA CN201110454587A CN103187681A CN 103187681 A CN103187681 A CN 103187681A CN 201110454587X A CN201110454587X A CN 201110454587XA CN 201110454587 A CN201110454587 A CN 201110454587A CN 103187681 A CN103187681 A CN 103187681A
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- China
- Prior art keywords
- laser
- light emitting
- emitting devices
- light
- drive circuit
- Prior art date
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Abstract
The invention provides a light emitting device which comprises a laser and an optical modulator which is used for modulating laser light emitted by the laser. The light emitting device further comprises a driving circuit, and the driving circuit is connected with the laser and is provided with a portion which adjusts a driving current according to the temperature change of the laser to stabilize the output wavelength of the laser.
Description
Technical field
The present invention relates to the optical communication field, relate in particular to light emitting devices.
Background technology
Existing light emitting devices generally adopts laser light source as illuminating source, and is right, because the easy temperature influence of this laser, along with the temperature rising of laser, output wavelength is to the drift of long wavelength's direction, and output is stable inadequately.
Summary of the invention
In view of this, provide a kind of light emitting devices of temperature influence that is difficult in fact for necessary.
A kind of light emitting devices, comprise that a laser and one are used for the light modulator of the laser light that this laser of modulation sends, this light emitting devices also comprises a drive circuit, this drive circuit links to each other with this laser, and this drive circuit has according to this laser temperature change regulates the part of drive current to stablize the output wavelength of this laser.
Wherein, this drive circuit comprises a thermistor.
Wherein, this light emitting devices also comprises a semiconductor optical amplifier, links to each other with this light modulator, is used for making this laser light generation four wave mixing behind the modulation and increases wavelength number.
With respect to prior art, light emitting devices provided by the invention is by the output wavelength of the drive circuit stable laser with temperature control function, and is of great advantage to the signal transmission of the long-pending body optical communication module of future high data and high frequency range.
Description of drawings
Fig. 1 is the schematic diagram of the light emitting devices that provides of the embodiment of the invention.
The main element symbol description
| |
100 |
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120 |
| |
140 |
| |
20 |
| Thermistor | 200 |
| Semiconductor |
30 |
| |
40 |
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41 |
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50 |
Following embodiment will further specify the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
See also Fig. 1, light emitting devices 100 provided by the invention comprises that a laser 120 and one are used for the light modulator 140 of the laser light that this laser 120 of modulation sends.This light emitting devices 100 also comprises a drive circuit 20 and a semiconductor optical amplifier 30.This laser 120 is semiconductor laser (semiconductor laser), for example Fabry-Perot laser diode (Fabry-Perot laser diode, FP LD).This light modulator 140 can be Mach-Zehnder modulator (Mach-Zehnder Modulator).
This drive circuit 20 links to each other with this laser 120, add the part of controlling drive current according to laser temperature change in this drive circuit 20, for example regulation device, regulation and control assembly, automatic temperature-adjusting control circuit wait drive current control a lower value, thereby stablize output wavelength, avoid the wavelength drift.In the present embodiment, add a thermistor 200 in the drive circuit 20, this thermistor 200 is when ambient temperature raises, and it is big that resistance becomes, and drive current diminishes, thereby stablizes the output wavelength of this laser 120.
This semiconductor optical amplifier 30 links to each other with this light modulator 140, is used for making this laser light generation four wave mixing behind the modulation and increases wavelength number.For instance, different laser light enters this semiconductor optical amplifier 30 (Semiconductor Optical amplifier if this laser 120 sends two bundle wavelength, during active region SOA) (Active Region) (not shown), the carrier density of active region will be subjected to the modulation of the interference term of this two bundles laser light, modulated carrier density can produce additional signal again conversely, thus newly-increased two-way signal light wave.Suppose to have in the same optical fiber two equidirectional different frequency light waves of advancing, the frequency of one of them light wave (centre wavelength is λ 1) is f1, another light wave (centre wavelength is λ 2) frequency is f2, then can produce the higher light wave of luminous power (optical power) that frequency is respectively 2f1-f2 and 2f2-f1 by four-wave mixing effect.So, the two-beam ripple becomes four bundle light waves, means that channel number increases.
In the present embodiment, more than two of the light wave that this laser 120 sends, so earlier by optical demultiplexer (an optical de-multiplexer) 40 with the multi beam laser light separately, selecting wherein two bundles to enter an optical coupler 41 then is coupled in the semiconductor optical amplifier 30, other two bundles enter in another optical coupler 41, enter into another semiconductor optical amplifier 30 then, four-wave mixing effect takes place respectively after, become eight the bundle light waves.Wherein, the number of the number of optical coupler 41 and semiconductor optical amplifier 30 is selected as required.
Though optical coupler 41 comprises two input ports and a delivery outlet among Fig. 1, is not limited to this form.The effect of optical coupler 41 is to select two or more light beams to merge in the semiconductor optical amplifier 30.
Be appreciated that can be respectively independent propagate also of the multi beam light wave of last formation can be by coupling or by being connected to an optical multiplexer 50(optical multiplexer) etc. mode in an optical fiber, transmit.
Light emitting devices provided by the invention is by the output wavelength of the drive circuit stable laser with temperature control function, and utilize four wave mixing technology to increase the optical wavelength number, under the constant situation of number of light sources, improve channel number, the low-cost volume with light emitting module of valency significantly, the signal that is very beneficial for following high data and high frequency range optical communication module transmits.
Be understandable that other variation that those skilled in the art also can do all should be included within the present invention's scope required for protection in spirit of the present invention.
Claims (7)
1. light emitting devices, comprise that a laser and one are used for the light modulator of the laser light that this laser of modulation sends, it is characterized in that: this light emitting devices also comprises a drive circuit, this drive circuit links to each other with this laser, and this drive circuit has according to this laser temperature change regulates the part of drive current to stablize the output wavelength of this laser.
2. light emitting devices as claimed in claim 1, it is characterized in that: this drive circuit comprises a thermistor.
3. light emitting devices as claimed in claim 1, it is characterized in that: this light emitting devices also comprises a semiconductor optical amplifier, links to each other with this light modulator, is used for making this laser light generation four wave mixing behind the modulation and increases wavelength number.
4. light emitting devices as claimed in claim 3, it is characterized in that: this light emitting devices also comprises an optical coupler, this optical coupler connects this light modulator and this semiconductor optical amplifier, is used for this laser light behind the modulation is coupled to this semiconductor optical amplifier.
5. light emitting devices as claimed in claim 3 is characterized in that: this light emitting devices comprises that also one is separated multiplexer and a plurality of optical coupler, and this is separated multiplexer and is used for and will divides to these a plurality of optical couplers behind this laser light demultiplexing light wave behind the modulation.
6. as the light emitting devices as described in each among the claim 1-5, it is characterized in that: this laser is semiconductor laser.
7. as the light emitting devices as described in each among the claim 1-5, it is characterized in that: this light modulator is the Mach-Zehnder modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110454587XA CN103187681A (en) | 2011-12-30 | 2011-12-30 | Light emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110454587XA CN103187681A (en) | 2011-12-30 | 2011-12-30 | Light emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103187681A true CN103187681A (en) | 2013-07-03 |
Family
ID=48678725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110454587XA Pending CN103187681A (en) | 2011-12-30 | 2011-12-30 | Light emitting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103187681A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5978395A (en) * | 1996-01-10 | 1999-11-02 | Nec Corporation | Light transmitting apparatus |
| US6393041B1 (en) * | 1999-05-10 | 2002-05-21 | Nec Corporation | Apparatus and method for controlling semiconductor laser module |
| CN1453910A (en) * | 2002-04-23 | 2003-11-05 | 古河电气工业株式会社 | Semiconductor used in laser module |
| US20030223757A1 (en) * | 2002-06-03 | 2003-12-04 | Takashi Yamamoto | Standard radio frequency signal generating method and standard radio frequency signal generating device |
| CN101174758A (en) * | 2007-10-30 | 2008-05-07 | 武汉电信器件有限公司 | Automatic control system of tunable laser based on lock wave |
| US20080310464A1 (en) * | 2004-08-03 | 2008-12-18 | Thomas Schneider | Device for Generating and Modulating a High-Frequency Signal |
-
2011
- 2011-12-30 CN CN201110454587XA patent/CN103187681A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5978395A (en) * | 1996-01-10 | 1999-11-02 | Nec Corporation | Light transmitting apparatus |
| US6393041B1 (en) * | 1999-05-10 | 2002-05-21 | Nec Corporation | Apparatus and method for controlling semiconductor laser module |
| CN1453910A (en) * | 2002-04-23 | 2003-11-05 | 古河电气工业株式会社 | Semiconductor used in laser module |
| US20030223757A1 (en) * | 2002-06-03 | 2003-12-04 | Takashi Yamamoto | Standard radio frequency signal generating method and standard radio frequency signal generating device |
| US20080310464A1 (en) * | 2004-08-03 | 2008-12-18 | Thomas Schneider | Device for Generating and Modulating a High-Frequency Signal |
| CN101174758A (en) * | 2007-10-30 | 2008-05-07 | 武汉电信器件有限公司 | Automatic control system of tunable laser based on lock wave |
Non-Patent Citations (1)
| Title |
|---|
| 董建绩 等: "基于半导体光放大器四波混频效应的多种调制格式的波长转换实验", 《光学学报》 * |
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Application publication date: 20130703 |
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| WD01 | Invention patent application deemed withdrawn after publication |