WO2002043206A1 - Dispositif de contrôle d'un transmetteur optique a laser stabilise en longueur d'onde - Google Patents
Dispositif de contrôle d'un transmetteur optique a laser stabilise en longueur d'onde Download PDFInfo
- Publication number
- WO2002043206A1 WO2002043206A1 PCT/FR2001/003420 FR0103420W WO0243206A1 WO 2002043206 A1 WO2002043206 A1 WO 2002043206A1 FR 0103420 W FR0103420 W FR 0103420W WO 0243206 A1 WO0243206 A1 WO 0243206A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- optical transmitter
- laser
- current
- cooling element
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
- H01S5/02415—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling by using a thermo-electric cooler [TEC], e.g. Peltier element
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
Definitions
- the invention relates to an optical wavelength stabilized laser transmitter, comprising:
- a laser module composed of a laser emitting diode connected to an optical fiber, a photodiode intended to measure the optical power transmitted by the laser emitting diode, and a thermoelectric cooling element, a temperature control circuit of the thermoelectric cooling element, and a second circuit for controlling the supply current of the laser emitting diode.
- the circuit for controlling the temperature of the thermoelectric cooling element generally comprises a direct current amplifier sensitive to a differential temperature.
- the heat dissipation in the amplifier is around 15W, which is proportional to the number of laser modules of equipment, and requires the use of radiator cooling devices to dissipate heat to the outside. This results in a loss of electrical energy, and a decrease in the efficiency of the installation.
- the object of the invention is to provide an optical laser transmitter stabilized in wavelength, and equipped with a temperature control circuit allowing good efficiency by lowering the current, and a minimum heat dissipation.
- the device according to the invention is characterized in that the first control circuit comprises a switching power supply with current inversion, formed by a bridge of transistors associated with a bipolar chopper circuit, which is controlled by a feedback circuit after comparison of the measurement signal of the laser module temperature with a reference signal corresponding to the set temperature.
- the transistor bridge has an output connected to a filtering circuit in connection with the thermoelectric cooling element. The alternating switching of two transistors of the bridge causes the reversal of the current in said thermoelectric cooling element.
- the input of the feedback circuit is connected: to a first temperature measurement circuit comprising an operational amplifier, one of the inputs of which is connected to a thermistor housed near the thermoelectric cooling element, - " and to a second voltage measurement circuit at the output terminals of the transistor bridge.
- the other input of the operational amplifier is connected to a resistive divider to define the reference signal corresponding to the set temperature.
- an initialization circuit comprises a retarder delivering a timed signal to the chopper circuit to limit the inrush current in the laser transmitter during start-up.
- a current limiting circuit comprises a switching transistor connected to the output of the feedback circuit, and means for inhibiting the control voltage of the chopping circuit when the output current of the bridge of transistors exceeds a predetermined threshold.
- the bipolar chopper circuit is triggered by a triangle generator delivering reference signals with pulse width modulation.
- FIG. 1 is a block diagram of the optical laser transmitter according to the invention
- Figure 2 shows the detailed circuit of the optical transmitter. Description of a preferred embodiment
- an optical transmitter 10 used in a DWDM multiplexing system comprises a wavelength stabilized laser module 12, which is controlled by a first temperature control circuit 14, and a second control 16 of the optical power delivered by the laser module 12.
- the laser module 12 is a commercial component, for example marketed under the reference A1915LMI by the company Alcatel or under the reference A1751 A by the company Lucent Technologies, comprising a laser emitting diode 18 connected by an optical fiber 20 to an optical connector EC output, and a photodiode 22 intended to drive the second control circuit 16 to stabilize the power of the laser transmitter 18.
- a TEC thermoelectric cooling element of the Peltier type is integrated inside the laser module 12, and is connected to the first control circuit 14 to regulate the temperature of the component. The wavelength of the optical signal emitted by the laser transmitter 18 can thus be stabilized with an accuracy of the order of 0.1 nm.
- the anode of the laser transmitter 18 is electrically connected to a line 24 in which an HF current flows in a frequency range of 40-850MHz.
- the cathode of the laser emitting diode 18 is at ground potential, as is the anode of the photodiode 22.
- Line 24 is connected to the RF input of electronic emission equipment via a impedance attenuator 26, an RF coupler 28, and an amplifier 30.
- a measurement signal representing the image of the optical power transmitted by the laser transmitter 18 is applied to the input of the second control circuit 16 of the photodiode 22 via a first connection conductor 32.
- a second link conductor 34 is connected between the output of the second control circuit 16 and the line 24 to adapt the supply current to the laser transmitter 18.
- a control circuit 36 manual or remote is connected to the second control circuit 16 for commissioning or stopping the laser module 12.
- the two control circuits 14 and 16 are in connection with terminals capable of being connected to an alarm circuit 38, which is made active in the event of abnormal operation of the optical transmitter 10.
- the first control circuit 14 of the TEC thermoelectric cooling element comprises a switching power supply, formed by a bridge of MOSFET transistors 40, controlled by a bipolar chopper circuit 42.
- a thermistor 44 permanently signals heating of the laser module 12 to a first measurement circuit 46 of temperature with operational amplifier 48 which compares the measurement signal of the thermistor 44 with a reference signal of a resistive divider 62 representative of the temperature of setpoint.
- the differential signal from the comparison controls the chopper circuit 42 so as to stabilize the temperature of the laser module 12.
- the input of the feedback circuit 47 is additionally connected to a second measurement circuit 60 of the voltage U at the terminals of the transistor bridge 40.
- An initialization circuit 50 includes a retarder 51 delivering a timed signal to the chopper circuit 42 to limit the inrush current in the laser transmitter 18 during startup.
- the chopper circuit 42 is triggered by a triangle generator 64 delivering reference signals with pulse width modulation.
- the output stage of the transistor bridge 40 is protected against overloads by a current limiting circuit 52, having a switching transistor 54 connected to the output of the counter-circuit. reaction 47, and means for inhibiting the control voltage of the chopper circuit 42 when the output current of the transistor bridge 40 exceeds a predetermined threshold.
- the optical power delivered by the laser transmitter 18 is stabilized by the second control circuit 16, comprising a transistor 53 connected to the photodiode 22 by the conductor 32, and a comparator 56 connected to the laser transmitter 18 by the conductor 34.
- the two outputs S1 and S2 of the bridge of transistors 40 MOSFET deliver rectified filtered signals in a filtering circuit 58 with inductance and capacitors.
- direct current can flow in the thermoelectric cooling element TEC in both directions depending on the conduction state of the transistor bridge 40, resulting in the stabilization of the wavelength of the optical signal. issued.
- the optical transmitter 10 according to the invention can be used in fiber optic and DWDM multiplexed telecommunications networks.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002223752A AU2002223752A1 (en) | 2000-11-23 | 2001-11-06 | Device for controlling a wavelength-stabilised laser optical transmitter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/15125 | 2000-11-23 | ||
FR0015125A FR2817083B1 (fr) | 2000-11-23 | 2000-11-23 | Dispositif de controle d'un transmetteur optique a laser stabilise en longueur d'onde |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002043206A1 true WO2002043206A1 (fr) | 2002-05-30 |
Family
ID=8856791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/003420 WO2002043206A1 (fr) | 2000-11-23 | 2001-11-06 | Dispositif de contrôle d'un transmetteur optique a laser stabilise en longueur d'onde |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002223752A1 (fr) |
FR (1) | FR2817083B1 (fr) |
WO (1) | WO2002043206A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105843274A (zh) * | 2016-03-28 | 2016-08-10 | 中国科学院半导体研究所 | 基于热电致冷器的温控电路及采用其的量子级联激光器 |
CN108711735A (zh) * | 2018-08-20 | 2018-10-26 | 江苏科大亨芯半导体技术有限公司 | 用于直调激光驱动器的温度补偿电路 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2131209A (en) * | 1982-11-02 | 1984-06-13 | Newton Derby Ltd | Switch mode power supply |
US5602860A (en) * | 1995-04-19 | 1997-02-11 | Optelecom, Inc. | Laser thermal control using thermoelectric cooler |
EP0814545A2 (fr) * | 1996-06-19 | 1997-12-29 | Kabushiki Kaisha Topcon | Dispositif d'émission d'un faisceau laser |
-
2000
- 2000-11-23 FR FR0015125A patent/FR2817083B1/fr not_active Expired - Fee Related
-
2001
- 2001-11-06 AU AU2002223752A patent/AU2002223752A1/en not_active Abandoned
- 2001-11-06 WO PCT/FR2001/003420 patent/WO2002043206A1/fr not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2131209A (en) * | 1982-11-02 | 1984-06-13 | Newton Derby Ltd | Switch mode power supply |
US5602860A (en) * | 1995-04-19 | 1997-02-11 | Optelecom, Inc. | Laser thermal control using thermoelectric cooler |
EP0814545A2 (fr) * | 1996-06-19 | 1997-12-29 | Kabushiki Kaisha Topcon | Dispositif d'émission d'un faisceau laser |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105843274A (zh) * | 2016-03-28 | 2016-08-10 | 中国科学院半导体研究所 | 基于热电致冷器的温控电路及采用其的量子级联激光器 |
CN108711735A (zh) * | 2018-08-20 | 2018-10-26 | 江苏科大亨芯半导体技术有限公司 | 用于直调激光驱动器的温度补偿电路 |
CN108711735B (zh) * | 2018-08-20 | 2024-05-24 | 江苏科大亨芯半导体技术有限公司 | 用于直调激光驱动器的温度补偿电路 |
Also Published As
Publication number | Publication date |
---|---|
FR2817083B1 (fr) | 2003-02-14 |
FR2817083A1 (fr) | 2002-05-24 |
AU2002223752A1 (en) | 2002-06-03 |
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