EM595 Benchtop Laser Controller
Features
· Easy-to-use control of G&H 14-pin butterfly lasers
· Touch panel interface
· USB interface
· 0.01°C temperature precision
· 1.5A of drive current, 3.0A of TEC current available
· Compact size
· Constant current operation
· Constant power operation
Applications
· Production work stations
· Laboratory benchtop
General Description
The EM595 combines a laser driver and TEC controller into a compact, benchtop device with straightforward user interface. With 1.5A of drive current available, the controller can operate any Gooch and Housego 14-pin DFB laser or single mode laser. The 3.0A of current available for the thermo-electric cooler provides ample control for typical room temperature environments. Precise tem-perature control results in accurate frequency control. The EM595 establishes a new level of low noise and linewidth performance in a benchtop device. The EM750 and EM650 OEM DFB modules should be considered for advanced noise and linewidth perfor-mance.
Sample Front Panel Interface Pictures
Laser Diode Control Specifications
Current Control (Constant Current Mode)
Control Range
0 to 1.5 A
Compliance Voltage
>4 V
Resolution
100mA (Front Panel), 50mm (Remote Control)
Accuracy
±(0.1% + 500 µA)
Noise and Ripple (typ)
10 µA without Noise Reduction Filter
5 µA with Noise Reduction Filter
(10 Hz to 10 MHz, RMS) @ 3.3 Ω 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 Range
1 mA to 1.5 A
Resolution
100mA (Front Panel), 50mm (Remote Control)
Accuracy
±(0.12% + 800 µA)
Photodiode Input
Low Setting
High Setting
Photocurrent Range
2 mA
20 mA
Photo Current Resolution (Via Front Panel)
100 nA
1 µA
Photo Current Resolution (Via Remote Control)
70 nA
700 nA
Photo Current Accuracy
±(0.08% +0.5 µA)
±(0.08% +5 µA)
Photodiode Reverse Bias Voltage
0.1 to 6V
Photodiode Input Impedance
~0 W (Virtual Ground)
Power Control (Constant Power Mode)
Low Setting
High Setting
Photo Current Control Ranges
0 to 2mA
0 to 20mA
Laser Voltage Measurement
Resolution
1mV (Front panel), 200mV (via Remote Control)
Accuracy
±(0.1% + 40 mV)
Laser Overvoltage Protection
Trip Voltage (typ)
4.2 V
Modulation Input
Input Impedance
10 kΩ
3dB 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)
Temperature Control Specifications TEC Current Output
Control Range
-3.0 to +3.0 A
Compliance Voltage
>4.7 V
Max Output Power
>14.1 W
Resolution
1mA (Front Panel) 100mm (Remote Control)
Accuracy
±(0.2% + 20 mA)
TEC Current Limit
Setting Range
5 mA to 3.0 A
Resolution
1mA (Front Panel) 100mm (Remote Control)
Accuracy
±(0.2% + 20 mA)
NTC Thermistor Sensors
Resistance Measurement Range
300 Ω to 150 kΩ
Control Range
-55 °C to +150 °C (Max)
Temperature Resolution
0.01 °C
Resistance Resolution
1 Ω
Accuracy
±(0.1% + 1 Ω)
Temp Stability (24 hours)
<0.005 °C (Typ.)
Temperature Coefficient
<5 mK/°C
Temperature Window Protection
Setting Range
0.01 °C to 100.0 °C
Protection Reset Delay
0 to 600 s
General Specifications
USB 2.0 Interface
Compliant with USBTMC/USBTMC-USB488 Specification Rev. 1.0
Interface Protocol
SCPI-Compliant Command Set
Supplied Drivers
VISA VXI pnp™, MS Visual Studio™, MS Visual Studio.net™, LabVIEW™,LabWindows/CVI™
Safety Features
Interlock, Keylock Switch, Laser Current Limit, Soft Start, Short Circuit
when Laser Off, Laser Overvoltage Protection, Over Temperature Protec-
tion, Temperature Window Protection
Display
4.3" LCD TFT, 480 x 272 Pixels
Socket for Laser, Photodiode, NTC, TEC
Compatible with Butterfly Type 1 (Pump) and Butterfly Type 2 (Telecom)
Connector for Modulation Input
SMA
Connector for Interlock & Laser On Signal
2.5 mm Mono Phono Jack
Connector for USB Interface
USB Type Mini-B
Chassis Ground Connector
4 mm Banana Jack
Desktop Power Supply, Line Voltage, Line Frequency
100 to 240 V ±10%, 47 to 63 Hz
Maximum Power Consumption
40 W
Operating Temperature
0 to +40 °C
Storage Temperature
-40 to +70°C
Warm-up Time for Rated Accuracy
30 min
Weight
1.0 kg
Dimensions without Operating Elements (WxHxD)
111 mm x 73.5 mm x 152.6 mm (4.37" x 2.9" x 6.01")
Dimensions with Operating Elements (WxHxD)
111 mm x 73.5 mm x 169.2 mm (4.37" x 2.9" x 6.66")