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Benchtop Laser Controller

The EM595 combines a laser driver and TEC controller into a compact, benchtop device with a straightforward USB or touch-pad user interface.

Full Product Description
Desktop power supply, line voltage, line frequency:
100 to 240 V ±10%, 47 to 63 Hz
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Product description

The EM595 combines a laser driver and TEC controller into a compact, benchtop device with a straightforward USB or touch-pad user interface. With 1.5A of drive current available, this controller can operate any G&H 14-pin DFB laser or single mode laser and provides 0.01 deg C temperature precision. With 3.0 A available for the thermo-electric cooler, the EM595 establishes an impressive level of low noise and linewidth performance in a benchtop device.

Key features

  • Compact size
  • Constant current operation
  • Constant power operation

Specifications

NameValue
USB 2.0 interfaceCompliant with USBTMC / USBTMC-USB488 Specification Rev. 1.0
Interface protocolSCPI-compliant command set
Supplied driversVISA VXI pnp™, MS Visual Studio™, MS Visual Studio.net™, LabVIEW™, LabWindows/CVI™
Display4.3" LCD TFT, 480 x 272 pixels
Socket for laser, photodiode, NTC, TECCompatible with Butterfly Type 1 (pump) and Butterfly Type 2 (telecom)
Connector for modulation inputSMA
Connector for interlock and laser on signal2.5 mm mono phone jack
Connector for USB interfaceUSB type Mini-B
Chassis ground connector4 mm banana jack
Desktop power supply, line voltage, line frequency100 to 240 V ±10%, 47 to 63 Hz
Power consumptionMax: 40 W
Operating temperature0 to +40° C
Storage temperature-40° C to +70° C
Warm-up time30 min for rated accuracy
Weight1.0 kg
DimensionsWithout operating elements (WxHxD): 111 mm x 73.5 mm x 152.6 mm (4.37" x 2.9" x 6.01"), With operating elements (WxHxD): 111 mm x 73.5 mm x 169.2 mm (4.37" x 2.9" x 6.66")

Current control (constant current mode)
Control range0 to 1.5 A
Compliance voltage> 4 V
Resolution100 µA (front panel), 50 µm (remote control)
Accuracy± (0.1% + 500 µA
Noise and rippleTyp: 10 µA without noise reduction filter
5 µA with noise reduction filter
(10 Hz to 10 MHz, RMS) @ 3.3 load, current < 1.2 A
Drift (24 hours)< 50 µA @ 0-10 Hz in constant ambient temperature
Temperature coefficient< 50 ppm / ° C
Current limit
Setting range1 mA to 1.5 A
Resolution100 µA (front panel), 50 µm (remote control)
Accuracy± (0.12% + 800 µA)
Photodiode inpuntLow settingHigh setting
Photocurrent range2 mA20 mA
Photocurrent resolution (via front panel)100 nA1 µA
Photocurrent resolution (via remote control)70 nA700 nA
Photocurrent accuracy±(0.08% +0.5 µA)±(0.08% +5 µA)
Photodiode reverse bias voltage0.1 to 6 V
Photodiode input impedance~ 0 Ω (virtual ground)
Power contro (constant power mode)Low settingHigh setting
Photocurrent control ranges0 to 2 mA0 to 20 mA
Laser voltage measurement
Resolution1 mV (front panel), 200 µV (via remote control)
Accuracy± (0.1% + 40 mV)
Laser overvoltage protection
Trip voltage (typ)4.2 V
Modulation input
Input impedance10 kΩ
3 dB bandwidth (constant current mode) DC to 7.5 kHz (with noise filter)DC to 250 kHz (without noise filter)
Modulation coefficient (constant current mode)150 mA/V ± 5%
Modulation coefficient (constant power mode)200 µA/V ± 5% (PD low range)2 mA/V ± 5% (PD high range)

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