ILX Lightwave LDX-3500 Series User manual

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User’s Guide
Precision Current Sources
LDX-3500 Series
ILX Lightwave Corporation P.O. Box 6310 Bozeman, MT, U.S.A. 59771 :· · · 1-800-459-9459 · ·
www.ilxlightwave.com
U.S.& Canada International Inquiries: 406-586-1244 Fax [phone]
E-mail: [e-mail]
70016907_R00_03/03
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TABLE OF CONTENTS
3_03 LDX-3500 Series 1
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TABLE OF CONTENTS
SafetyInformationandtheManual.................................vii
GeneralSafetyConsiderations ....................................vii
SafetyMarkingSymbols ........................................viii
Comments,Suggestions,andProblems ............................ x
Chapter 1 Introduction and Specifications
ProductOverview ................................................. 1
AvailableOptionsandAccessories ................................ 1
Specifications:LDX-3525 ........................................... 2
Specifications:LDX-3545 ........................................... 5
Specifications:LDX-3565 ........................................... 8
Chapter 2 Installation and Operation
Installation ...................................................... 11
ACPowerConsiderations....................................... 11
RackMounting.............................................. 12
Power-UpSequence........................................... 12
IntroductiontotheLDX-3500SeriesFrontPanel ........................ 13
Adjustments ................................................ 13
Display .................................................... 13
Parameters ................................................ 14
ParameterSetup............................................. 14
CurrentOutput .............................................. 14
ControlModeandCurrentRange ............................... 15
Modulation ................................................. 15
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TABLE OF CONTENTS
2 LDX-3500 Series
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BackPanelControlsandConnections ............................. 16
TheLaserConnectors ........................................ 17
AnalogOutput .............................................. 17
ConnectingtoYourLaser ..................................... 17
KeySwitch ................................................. 17
LaserDiodeConnectionsandShielding .......................... 18
Photodiode Feedback Connections . . . . . . ........................ 20
GroundingConsiderations ..................................... 20
GeneralOperatingProcedures ...................................... 21
Warm-UpandEnvironmentalConsiderations ....................... 21
CurrentModeOperation ........................................ 21
PowerModeOperation......................................... 22
Chapter 3 Maintenance
CalibrationOverview .............................................. 24
RecommendedEquipment ......................................... 24
EnvironmentalConditions ....................................... 24
Warm-Up ................................................... 25
CalibrationAdjustments............................................ 25
CurrentSourceCalibration .................................... 25
MonitorCurrent(PowerMode)Calibration .......................... 27
Appendix A Troubleshooting
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LIST OF FIGURES
3_03 LDX-3500 Series iii
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LIST OF FIGURES
Figure 2.1 LDX-3525FrontPanel ................................ 13
Figure 2.2 LDX-3500SeriesBackPanel .......................... 16
Figure 2.3 BackPanelLDController ............................. 17
Figure 2.4 CommonLaserCathode-PhotodiodeCathode ............ 18
Figure 2.5 CommonLaserCathode-PhotodiodeAnode .............. 18
Figure 2.6 CommonLaserAnode-PhotodiodeCathode .............. 19
Figure 2.7 CommonLaserAnode-PhotodiodeAnode ............... 19
Figure 3.1 IPDCalibrationCircuit ................................ 27
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LIST OF FIGURES
iv LDX-3500 Series
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LIST OF TABLES
3_03 LDX-3500 Series v
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LIST OF TABLES
Table 2.1 ModulationTransferFunctions........................... 15
Table 3.1 RecommendedTestEquipment.......................... 24
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LIST OF TABLES
vi LDX-3500 Series
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LDX-3500 Series vii
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SAFETY AND WARRANTY INFORMATION
The Safety and Warranty Information section provides details about cautionary
symbols used in the manual, safety markings used on the instrument, and
information about the Warranty including Customer Service contact information.
Safety Information and the Manual
Throughout this manual, you will see the words Caution and Warning indicating
potentially dangerous or hazardous situations which, if not avoided, could result in
death, serious or minor injury, or damage to the product. Specifically:
Caution indicates a potentially hazardous situation which can result in minor or
moderate injury or damage to the product or equipment.
Warning indicates a potentially dangerous situation which can result in serious injury or
death.
WARNING
Visible and/or invisible laser radiation. Avoid direct exposure to the beam.
General Safety Considerations
If any of the following conditions exist, or are even suspected, do not use the
instrument until safe operation can be verified by trained service personnel:
•Visible damage
•Severe transport stress
•Prolonged storage under adverse conditions
•Failure to perform intended measurements or functions
If necessary, return the instrument to ILX Lightwave, or authorized local ILX
Lightwave distributor, for service or repair to ensure that safety features are
maintained (see the contact information on page x).
All instruments returned to ILX Lightwave are required to have a Return
Authorization Number assigned by an official representative of ILX Lightwave
Corporation. See Returning an Instrument on page ix for more information.
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SAFETY SYMBOLS
viii LDX-3500 Series
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SAFETY SYMBOLS
This section describes the safety symbols and classifications.
Technical specifications including electrical ratings and weight are included within
the manual. See the Table of Contents to locate the specifications and other
product information. The following classifications are standard across all ILX
Lightwave products:
•Indoor use only
•Ordinary Protection: This product is NOT protected against the harmful ingress of moisture.
•Class I Equipment (grounded type)
•Mains supply voltage fluctuations are not to exceed ±10% of the nominal supply voltage.
•Pollution Degree II
•Installation (overvoltage) Category II for transient overvoltages
•Maximum Relative Humidity: <80% RH, non-condensing
•Operating temperature range of 0 °C to 40 °C
•Storage and transportation temperature of –40 °C to 70 °C
•Maximum altitude: 3000 m (9843 ft.)
•This equipment is suitable for continuous operation.
Safety Marking Symbols
This section provides a description of the safety marking symbols that appear on
the instrument. These symbols provide information about potentially dangerous
situations which can result in death, injury, or damage to the instrument and other
components.
Caution,
refer to
manual
Earth
ground
Te r m i n a l
Alternating
current
Visible and/or
invisible laser
radiation
Caution, risk
of electric
shock
Protective
Conductor
Te r m i n a l
Caution, hot
surface
Frame or
chassis
Ter min a l
On: In position of a bistable push control.
The slash (I) only denotes that mains are on.
Off: Out position of a bistable push control.
The circle (O) only denotes that mains are off.
or
(I) or
(O)
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WARRANTY
3_03 LDX-3500 Series ix
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WARRANTY
ILX LIGHTWAVE CORPORATION warrants this instrument to be free from
defects in material and workmanship for a period of one year from date of
shipment. During the warranty period, ILX will repair or replace the unit, at our
option, without charge.
Limitations
This warranty does not apply to fuses, lamps, defects caused by abuse,
modifications, or to use of the product for which it was not intended.
This warranty is in lieu of all other warranties, expressed or implied, including any
implied warranty of merchantability or fitness for any particular purpose. ILX
Lightwave Corporation shall not be liable for any incidental, special, or
consequential damages.
If a problem occurs, please contact ILX Lightwave Corporation with the
instrument's serial number, and thoroughly describe the nature of the problem.
ReturninganInstrument
If an instrument is to be shipped to ILX Lightwave for repair or service, be sure to:
1Obtain a Return Authorization number (RA) from ILX Customer Service.
2Attach a tag to the instrument identifying the owner and indicating the required service or
repair. Include the instrument serial number from the rear panel of the instrument.
3Attach the anti-static protective caps that were shipped with the instrument and place the
instrument in a protective anti-static bag.
4Place the instrument in the original packing container with at least 3 inches (7.5 cm) of
compressible packaging material. Shipping damage is not covered by this warranty.
5Secure the packing box with fiber reinforced strapping tape or metal bands.
6Send the instrument, transportation pre-paid, to ILX Lightwave. Clearly write the return
authorization number on the outside of the box and on the shipping paperwork. ILX
Lightwave recommends you insure the shipment.
If the original shipping container is not available, place your instrument in a
container with at least 3 inches (7.5 cm) of compressible packaging material on all
sides.
Repairs are made and the instrument returned transportation pre-paid. Repairs
are warranted for the remainder of the original warranty or for 90 days, whichever
is greater.
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WARRANTY
x LDX-3500 Series
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Claims for Shipping Damage
When you receive the instrument, inspect it immediately for any damage or
shortages on the packing list. If the instrument is damaged, file a claim with the
carrier. The factory will supply you with a quotation for estimated costs of repair.
You must negotiate and settle with the carrier for the amount of damage.
Comments, Suggestions, and Problems
To ensure that you get the most out of your ILX Lightwave product, we ask that
you direct any product operation or service related questions or comments to ILX
Lightwave Customer Support. You may contact us in whatever way is most
convenient:
Phone ........................... [phone]or(406)586-1244
Fax............................................. [phone]
Onthewebat: ....................................ilx.custhelp.com
Or mail to:
ILX Lightwave Corporation
P. O . B o x 6 3 1 0
Bozeman, Montana, U.S.A 59771
www.ilxlightwave.com
When you contact us, please have the following information:
Model Number:
Serial Number:
End-user Name:
Company:
Phone:
Fax:
Descriptionofwhatis
connected to the ILX
Lightwave instrument:
Description of the problem:
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WARRANTY
3_03 LDX-3500 Series xi
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If ILX Lightwave determines that a return to the factory is necessary, you are
issued a Return Authorization (RA) number. Please mark this number on the
outside of the shipping box.
You or your shipping service are responsible for any shipping damage when
returning the instrument to ILX Lightwave; ILX recommends you insure the
shipment. If the original shipping container is not available, place your instrument
in a container with at least 3 inches (7.5 cm) of compressible packaging material
on all sides.
We look forward to serving you even better in the future!
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WARRANTY
xii LDX-3500 Series
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LDX-3500 Series 1
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CHAPTER 1
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INTRODUCTION AND SPECIFICATIONS
This manual contains operation and maintenance information for the LDX-3500
Series Precision Current Sources. If you want to get started right away, read
Chapter 2, which covers Operation, first.
Product Overview
The LDX-3500 Series Precision Current Sources provide a high stability output
with a fully redundant current limit and multiple laser protection features.
Available Options and Accessories
Options and accessories available for the LDX-3500 Series Precision Current
Sources include the following:
Other Laser Diode Mounts are available. Please contact ILX Lightwave for
information on additional options for your applications.
Description Model Number
Single rack mount flange kit 134
Dual rack mount flange kit (enables installation into a standard 19
inch wide rack)
135
Temperature Controlled Laser Diode Mount 4407
Temperature Controlled Laser Diode Mount (available with
collimating assembly)
4412
High Power Laser Diode Mount 4442
Current Source Interconnect Cable 301
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INTRODUCTION AND SPECIFICATIONS
Specifications: LDX-3525
2 LDX-3500 Series
CHAPTER 1
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Specifications: LDX-3525
1. Stability specifications are measured at half-scale output, after a one hour warm-up period.
2. Extrapolated from resulting intensity fluctuations of a laser diode, measured optically with a 150 kHz bandwidth photodetector.
3. The instrument contains a circuit which will turn off the output if a transient is detected.
4. Maximum output current transients resulting from normal operational situations (e.g., power on-off) as well as accidental situations
(e.g., power line plug removal)
5. Maximum output current transients resulting from a 200 V power-line spike.
6. Specified values are a percent of nominal. Constant-power mode stability specification assumes zero drift in detector responsivity.
Current Source 200 mA Range 500 mA Range
Set Point Accuracy +0.2 mA +0.5 mA
Set Point Resolution 50 µA125µA
Compliance Voltage (fixed) 7 V maximum 7 V maximum
Temperature Coefficient < 50 ppm/oC < 50 ppm/oC
Stability1, for 1 hour < 20 ppm < 20 ppm
Stability1, for 24 hours < 50 ppm < 50 ppm
Noise and Ripple2
High Bandwidth Mode
CW Mode
<1mA
<5mA
<1mA
<5mA
Worst Case Transients3
Operational4
Power-line induced5
<1mA
<5mA
<1mA
<5mA
Photodiode Feedback
Range 5 to 5000 µA
Output Stability6+0.02%
Set Point Accuracy +5µA
Bias Voltage 0 - 5 V reverse bias (+ 10%)
Power Modulation Bandwidth 1 kHz
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INTRODUCTION AND SPECIFICATIONS
Specifications: LDX-3525
3_03 LDX-3500 Series 3
CHAPTER 1
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7. Fifty percent modulation at half-scale output.
Display 200 mA Range 500 mA Range
Output Current Range 0.0 to 200.0 mA 0.0 to 500.0 mA
Output Current Resolution 0.1 mA 0.1 mA
Output Current Accuracy at 25 oC+0.2 mA +0.5 mA
Photodiode Current Range 0 - 5000 µA 0 - 5000 µA
Photodiode Current Resolution 1 µA1µA
Photodiode Current Accuracy +5µA+5µA
Responsivity Range 0.001 - 1.000 mA/mW 0.001 - 1.000 mA/mW
Responsivity Resolution 0.001 mA/mW 0.001 mA/mW
Optical Power Range 0.000 mW - 500.0 mW 0.000 mW - 500.0 mW
Output Power Resolution 1 µW, 10 µWor100µW1µW, 10 µWor100µW
Current Limit Setting 200 mA Range 500 mA Range
Range 0 - 202 mA 0 - 505 mA
Resolution 1 mA 2 mA
Accuracy +2mA +5mA
Analog Modulation/Voltage Control
Input 0 - 10 V, 10 KX 0 - 10 V, 10 KX
Transfer Function 20 mA/V 50 mA/V
Transfer Function Accuracy +10% +10%
Bandwidth7(3 dB)
High Bandwidth Mode
CW Mode
DC to 500 kHz
DC to 100 Hz
DC to 150 kHz
DC to 100 Hz
Analog Output
Output Voltage 0 - 10 V 0 - 10 V
Transfer Function 20 mA/V 50 mA/V
Transfer Function Accuracy +5% +5%
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INTRODUCTION AND SPECIFICATIONS
Specifications: LDX-3525
4 LDX-3500 Series
CHAPTER 1

General LDX-3525 Specifications
Connectors
Photodiode Monitor and Current
Source Connectors
9-pin, D-sub; auxiliary BNC for monitor photodiode output
External Modulation Connector BNC, instrumentation amplifier input
Analog Output BNC
General
Size 3.5” x 7.3” x 12”
Weight 6.0 lbs.
Power Requirements 100, 120, 220-240 VAC (+10%), 50-60 Hz
Temperature 0 to +40 oC operating; -40 to +70 oCstorage
Humidity < 85% relative humidity, non-condensing
Laser Safety Feature Key switch, interlock and output delay
(meets CDRH US21 CFR 1040.10)
Display type 4-digit, green LED
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INTRODUCTION AND SPECIFICATIONS
Specifications: LDX-3545
3_03 LDX-3500 Series 5
CHAPTER 1
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Specifications: LDX-3545
1. Stability specifications are measured at half-scale output, after a one hour warm-up period.
2. Extrapolated from resulting intensity fluctuations of a laser diode, measured optically with a 150 kHz bandwidth photodetector.
3. The instrument contains a circuit which will turn off the output if a transient is detected.
4. Maximum output current transients resulting from normal operational situations (e.g., power on-off) as well as accidental situations
(e.g., power line plug removal)
5. Maximum output current transients resulting from a 200 V power-line spike.
6. Specified values are a percent of nominal. Constant-power mode stability specification assumes zero drift in detector responsivity.
Current Source 1000 mA Range 3000 mA Range
Set Point Accuracy +1mA +3mA
Set Point Resolution 250 µA750µA
Compliance Voltage (fixed) 6.5 V maximum 6.5 V maximum
Temperature Coefficient < 50 ppm/oC < 50 ppm/oC
Stability1, for 1 hour < 20 ppm < 20 ppm
Stability1, for 24 hours < 50 ppm < 50 ppm
Noise and Ripple2
High Bandwidth Mode
CW Mode
<8µArms
<8µArms
<20µArms
<15µArms
Worst Case Transients3
Operational4
Power-line induced5
<2mA
<10mA
<5mA
<10mA
Photodiode Feedback
Range 5 to 9999 µA
Output Stability6+0.02%
Set Point Accuracy +10 µA
Bias Voltage 0 - 5 V reverse bias (+ 10%); adjustable on back panel
Power Modulation Bandwidth 1 kHz
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