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A Choice Of Operation Modes Put You in the Driver's Seat
With the LDC-3700B Series Controllers, you can easily control the current to your laser diode in one of three modes: 1) constant current, CW 2) constant current, high-bandwidth 3) constant light power
The CW mode offers improved laser protection and noise performance. This low-bandwidth mode is optimized for DC operation, and supports external modulation.
In high-bandwidth mode, the output stage supports higher frequency, external modulation suitable for dithering the laser current for power and wavelength tuning. The modulation port is implemented as a differential input, allowing the modulation control voltage and laser outputs to use different grounds.
The constant light mode provides constant optical power by using the photocurrent from the laser diode's rear-facet monitor, or an external photodiode in a feedback control loop to thelaser driver current.
Control Temperature in One of ThreeModes of Operation
With the LDC-3700B Series Controllers, you can easily set the temperature output to control temperature in one of three modes: 1) Constant temperature 2) Constant sensor value 3) Constant TE module current In the constant temperature mode, you candrive your TE module to a temperature anywhere from –99°C to 199°C, depending on the TE module, load, and thermistor or ICtemperature sensor selected.
The LDC-3700B also features GPIB readable TEC voltage measurement for monitoring the power consumption of your laser diode module.The sensor value (R) mode gives you the flexibility to drive to a certain thermistor resistance value, or to a desired AD590 current or LM335 voltage. The TE-module current mode lets you drive the output to a predetermined TE-module current setting. If the temperature sensor or TE module opens during operation, the laser diode output shuts down and the appropriate fault indicator lamp flashes.
TEC Output Limits Provide Worry-free Cooling In addition to the normal control modes,the TEC outputs of the LDC-3700B Controllers are bound by a fully independent hardware current limitthat can not be exceeded in any mode of operation. The output can be bound by a high-temperature limit setting. Adjustment ofeither setting is easy and precise. If the limits areexceeded, the appropriate fault indicator lamp will flash. Put Our Expertise to Work for You
ILX Lightwave is a recognized world leader in photonic test and measurement instrumentation. Our products are not onlyrenowned for their reliability, quality and value, they're backed by strong after-sales support. For more information, call us today.