Dual Photodiode Meter Fiber Alignment Photodiode Meter Model 2500
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2500 2502
Dual Photodiode Meter Fiber Alignment Photodiode Meter
Model 2500 Model 2502 Photodiode Meters designed increase throughput Keithley's L-I-V (light-current-voltage) test system production testing laser diode modules (LDMs). Developed close cooperation with leading manufacturers LDMs fiberoptic telecommunication networks, these dual-channel instruments have features that make them easy synchronize with other system elements tight control over optical power measurements. Model 2502 features high speed analog output that allows using L-I-V test system fiber alignment stage manufacturing process. Through buffer memory Trigger Link interface that's unique Keithley instruments, Model 2500 Model 2502 offer fastest throughput available today L-I-V testing laser diode modules. These instruments ruggedly engineered meet reliability repeatability demands continuous operation round-the-clock production environments. Low-Level, High Speed Measurements Model 2500 Model 2502 combine Keithley's expertise low-level current measurement with high-speed current measurement capabilities. Each channel these instruments consists voltage source paired with high-speed picoammeter. Each channels independent picoammeter voltage source with measurements made simultaneously across both channels. Part High-Speed L-I-V Test System laser diode module DC/CW test stand, Model 2500 Model 2502 provides voltage bias both back facet monitor diode Model 2500INT Integrating Sphere fiber-coupled photodetector. same time applies voltage biases, measures current outputs photodetectors converts these outputs measurements optical power. conversion performed with user-programmed calibration coefficient wavelength laser diode module. Fast, accurate measurements optical power critical analyzing coupling efficiency optical power characteristics laser diode being tested. When testing modules with multiple detectors, Model 2500 Model 2502 pack more testing capabilities into less test rack space. Fiber Alignment Model 2502's built-in high speed analog output makes suitable precision fiber alignment tasks. This instrument combines ability align optical fiber quickly accurately with laser diode's optimum light emitting region with capability make precision L-I-V measurements, same test fixture. Model 2502's wide dynamic range allows early beam skirt detection, reducing time required fiber alignment. L-I-V sweep performed during alignment process optimize fiber location entire operating range. High speed feedback minimizes delays alignment process, it's unnecessary sacrifice alignment speed ensure accurate device characterization. Wide Dynamic Measurement Range Model 2500 Model 2502 offer current measurement ranges from 20mA decade steps. This provides photodetector current measurement ranges testing laser diodes LEDs, applications such L-I-V testing, total radiance measurements, measurements cross-talk insertion loss optical switches, many others. Model 2500 Model 2502 meet industry testing requirements transmitter well pump laser modules.
2500/2502:
Dual-channel instrument optical power measurements ±100V photodetector bias capability Measure photodetector current from 20mA dark current measurement resolution Measure optical power directly when used with Model 2500INT Integrating Sphere User-programmable photodetector calibration coefficients 3000-point buffer memory each channel allows data transfer after test completion Digital Trigger Link binning sweep test operations IEEE-488 RS-232 interfaces
2502:
0-10V analog output high resolution optical power feedback Provides high accuracy, high speed fiber alignment solution Allows assembly process, final testing, parts binning, specification Allows faster alignment fiber with laser diode's optimum light emitting region Combines fiber alignment device characterization processes
1.888.KEITHLEY
(U.S. only)
www.keithley.com
OPTOELECTRONIC TEST SOLUTIONS
Dual channel optical power measurement
2500 2502
Ordering Information
2500 2502 Dual Photodiode Meter Fiber Alignment Photodiode Meter
Dual Photodiode Meter Fiber Alignment Photodiode Meter
High Accuracy Dark Current Measurements Model 2500's Model 2502's current measurement range ideal measuring dark currents, with resolutiom. Once level dark current been determined, instrument's function automatically subtracts dark current offset measured values more accurate optical power measurements. Voltage Bias Capability Model 2500 Model 2502 provide choice voltage bias ranges: ±10V ±100V. This choice gives system integrator ability match bias range more closely type photodetector being tested, typically ±10V large area photodetectors ±100V avalanche-type photo-detectors. This ability match bias photodetector ensures improved measurement linearity accuracy. High Testing Throughput Model 2500 Model 2502 capable taking readings/second channel 41/2-digit resolution. This speed comparable with measurement speed Model 2400 SourceMeter® instrument, which often used conjunction with Model 2500 Model 2502 perform optoelectronic device test characterization. three instruments support Trigger Link proprietary "hardware handshaking" triggering system that's unique Keithley products) buffer memory. When programmed execute sweep, Trigger Link ensures measurement integrity keeping source measurement functions working lock step while buffer memories record measurements. Together, source memory, buffer memory, Trigger Link allow elimination GPIB traffic during test sweep, improving test throughput dramatically. Ratio Delta Measurements Model 2500 Model 2502 provide ratio delta measurements between completely isolated channels, such ratio back facet monitor detector fiber-coupled photodetector varying levels input current. These functions accessed front panel GPIB interface. test setups with multiple detectors, this capability allows targeted control capabilities laser diode module. Programmable Limits Filters with most Keithley instruments, Model 2500's Model 2502's current voltage limit programmed ensure device protection during critical points such start test, etc. These instruments also provide Average Median filters, which applied data stored buffer memory. Adaptable Evolving Requirements Unlike optical power meters with integrated detectors, Model 2500 Model 2502 allow user choose from wide range measurement capabilities simply selecting appropriate photodetector programming calibration coefficient this detector wavelength choice. Interface Options speed simplify system integration control, Model 2500 Model 2502 include Trigger Link feature digital lines, well standard IEEE-488 RS-232 interfaces. Trigger Link feature combines independent software selectable trigger lines single connector simple, direct control over instruments system. This feature especially useful reducing total test time test involves sweep. Model 2500 Model 2502 sweep through series measurements based triggers received from SourceMeter Instrument. digital lines simplify external handler control binning operations.
Dual channel optical power measurement
These products available with Extended Warranty. Accessories Supplied User's Manual
APPLICATIONS Production testing Laser diode modules Chip submount laser diodes LEDs Passive optical components Laser diode bars Fiber alignment
Trigger Link
2510/ 2510-AT
Thermistor
Peltier
2400/2420/ 2440
2500/ 2502
Fiber GPIB
OPTOELECTRONIC TEST SOLUTIONS
Computer
2500INT Integrating Sphere
Model 2500 Model 2502 designed tight integration with other Keithley instruments that often used L-I-V test systems laser diode modules. These other instruments include Model 2400 SourceMeter Model 2510 SourceMeter instruments.
1.888.KEITHLEY
(U.S. only)
www.keithley.com
2500 2502
Dual Photodiode Meter Fiber Alignment Photodiode Meter
GENERAL TYPICAL NOISE FLOOR MEASUREMENT SPECIFICATION6
RANGE 2.000000 20.00000 200.0000 2.000000 20.00000 200.0000 2.000000 20.00000 TYPICAL NOISE FLOOR STDEV), SAMPLES 0.01 NPLC NPLC NPLC NPLC
Models 2500 2502 Dual Photodiode Meters measure display either photodiode current optical power photodiodes with appropriate user-supplied optical power gain/wavelength calibration factors. Model 2502 includes analog output jack rear panel each channel.
Measurement Specifications
MAXIMUM RESOLUTION ACCURACY1, 23°C ±5°C rdg. offset) TEMPERATURE COEFFICIENT 0°-18°C 28°-50°C ±(%rdg. offset)/°C INPUT IMPEDANCE3 (Maximum)
RANGE
2.000000 20.00000 200.0000 2.000000 20.00000 200.0000 2.000000 20.00000
1.00% 0.40% 0.30% 0.20% 0.10% 0.10% 0.10% 0.10%
0.01 0.01 0.02 0.02 0.01 0.01 0.02 0.02
MAXIMUM INPUT: ±20.0mA.
TYPICAL SPEED NOISE REJECTION4
DIGITS 41/2 51/2 61/2 READINGS/s GPIB (SCPI) GPIB (488.1) NPLC 0.01 NMRR
PHOTODIODE VOLTAGE BIAS SPECIFICATIONS2
RANGE RESOLUTION ACCURACY 23°C ±5°C MAXIMUM CURRENT LOAD REGULATION5 TEMPERATURE COEFFICIENT
±100
<400
±(0.15% setting ±(0.3% setting
0.30%, 0.30%,
ppm/°C ppm/°C
NOTES:
Speed Normal (1.0 NPLC), Filter year. Measured Vin/Iin full scale (and zero) input currents. Dual channel, internal trigger, measure only, display off, Autorange off, Auto Zero off, source delay filters off, limits off, CALC5 CALC6 off, 60Hz. Measured Vin/Iin full scale (20mA) zero load currents. Noise floor measured standard deviation), samples, Filter off, open (capped) input. Specification design. Measured input triax) full scale (20mA) zero input currents.
1.888.KEITHLEY
(U.S. only)
www.keithley.com
analog output voltage each channel referenced that channel's floating ground.
OPTOELECTRONIC TEST SOLUTIONS
SOURCE CAPACITANCE: Stable 10.0nF typical. INPUT BIAS CURRENT7: 50fA max. 23°C. INPUT VOLTAGE BURDEN8: 4.0mV max. VOLTAGE SOURCE SLEW RATE: 3.0ms/V typical. COMMON MODE VOLTAGE: 200VDC. COMMON MODE ISOLATION: Typically parallel with 150nF. OVERRANGE: 105% measurement range. MEMORY BUFFER: 6000 readings (two 3000 point buffers). Includes selected measured value(s) time stamp. PROGRAMMABILITY: IEEE-488 (SCPI-1995.0), RS-232, five user-definable power-up states plus factory default *RST. DIGITAL INTERFACE: Enable: Active input. Handler Interface: Start test, test, category bits. 300mA supply. Digital I/O: trigger input, TTL/Relay Drive outputs (33V 500mA, diode clamped). POWER SUPPLY: 100V/120V/220V/240V ±10%. LINE FREQUENCY: 60Hz. POWER DISSIPATION: 60VA. WARRANTY: year. EMC: Complies with European Union Directive 89/336/EEC. VIBRATION: MIL-T-28800F Random Class SAFETY: Complies with European Directive 73/23/EEC. WARM-UP: hour rated accuracy. DIMENSIONS: 89mm high 213mm wide 370mm deep (31/2 83/8 149/16 in). Bench configuration (with handle feet): 104mm high 238mm wide 370mm deep (41/8 93/8 149/16 in). WEIGHT: 23.1kg (10.5 lbs). ENVIRONMENT: Operating: 0°-50°C, R.H. 35°C non-condensing. Derate R.H./°C, 35°-50°C. Storage: -25° 65°C, non-condensing.
Model 2500/2502 Specifications
2500 2502
Dual Photodiode Meter Fiber Alignment Photodiode Meter
ANALOG OUTPUT SPECIFICATIONS (2502 ONLY)
OUTPUT VOLTAGE RANGE1: Output inverting: -10V positive full scale input. +10V negative full scale input. OUPUT IMPEDANCE: typical. TEMPERATURE COEFFICIENT 0°-18°C 28°-50°C ±(%output offset)/°C 0.30% 0.11% 0.30% 0.11% 0.30% 0.11% 0.30% 0.11%
Model 2500/2502 Specifications
RANGE 2.000000 20.00000 200.0000 2.000000 20.00000 200.0000 2.000000 20.00000
ACCURACY 23°C ±5°C ±(%output offset) 6.0% 3.0% 6.0% 3.0% 6.0% 2.5% 6.0% 2.5%
RISE TIME Typical (10% 90%)
analog output voltage each channel referenced that channel's floating ground.
OPTOELECTRONIC TEST SOLUTIONS
Keithley Instruments, Inc.
Copyright 2001 Keithley Instruments, Inc. Printed U.S.A.
28775 Aurora Road Cleveland, Ohio 44139 440-248-0400 Fax: 440-248-6168 1-888-KEITHLEY (534-8453) www.keithley.com
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