Stanford LDC501 Laser Diode Controller

Laser diode controller with integrated temperature controller

Stanford Research

Distributed only in Germany

This is a discontinued product

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Overview
Features & Benefits

Key Facts

Laser Diode Controller
TEC Controller

Brief Description

Introducing the LDC501Laser Diode Controller: a highly stable, low-noise current source, with an integrated temperature controller - all at a very affordable price.

Specifications

Laser Diode Current Source
Range	0 to 500 mA
Setpoint resolution	10 µA

Key Facts

Laser Diode Controller
- 500mA low-noise current source
- Low drift (<10ppm/°C)
- 1.1 MHz modulation
- GPIB, RS-232 and Ethernet
TEC Controller
- 36W output power
- High stability 0.0005°C/°C
- Thermistor, RTD and IC sensors
- Auto-tuning of loop parameters
- CC & CP mode dynamic switching

Brief Description

Introducing the LDC501Laser Diode Controller: a highly stable, low-noise current source, with an integrated temperature controller - all at a very affordable price.

The LDC501 is the ideal instrument for controlling the current and temperature of your laser diodes. It has the performance and features you expect from instruments costing twice as much.

With a low-noise current source that delivers up to 500 mA, a 36 W high-precision temperature controller, and standard computer interfaces including Ethernet, the LDC501 is the right choice for your laser diode testing and control applications.

Specifications

Laser Diode Current Source

Current Source
Range	0 to 500 mA
Setpoint resolution	10 µA
Accuracy	±0.01 % of full scale
Output impedance	>1MΩ (DC)
Stability
Thermal	<10 ppm/°C
Short-term (1 hr.)	<5 ppm full scale
Long-term (24 hr.)	<20 ppm full scale
Noise	<3.5 nA/√Hz
	<3 µA rms (10 Hz to 100 kHz)
Compliance voltage
Range	0 to 10V, programmable
Resolution	10mA
Accuracy	±0.5%
Current Limit
Range	0 to 501mA
Resolution	1mA
Accuracy	±2mA

Analog Modulation
Input range	0 to 10V
Input impedance	4 kΩ
Gain
CC mode	50mA/V (LD current)
CP mode	500 µA/V (PD current)
Bandwidth (3 dB)
CC mode	DC to 1.1 MHz (high)
	DC to 10 kHz (low)
CP mode	DC to 10 kHz (high)
	DC to 90 Hz (low)

Monitor Photodiode
Bias voltage	0 to 5V, programmable
PD current range	3 to 5000 µA
Setpoint resolution	1 µA (CP mode)
Setpoint accuracy	±2 µA
Drift	±0.03% (CP mode)

Measurement & Display
Output current
Range	0 to 501mA
Resolution	0.01mA
Accuracy	±0.03 % FS
Photodiode current
Range	0 to 5010 µA
Resolution	0.1 µA
Laser diode forward voltage
Range	0 to 12V
Resolution	1mV
Accuracy	±2mV (4 wire)

Temperature Control
Control range
Firmware limits	-150 °C to +250 °C
Setpoint resolution	0.001 °C
Setpoint accuracy	0.01 °C, sensor dependent
Stability (typ.)	(using a 10 kΩ NTD thermistor)
Thermal	0.0005°C/°C (vs. ambient)
Short-term (1 hr.)	±0.001 °C
Long-term (24 hr.)	±0.004 °C
Control algorithm	PID, with autotuning & antiwindup

TEC Output
Source type	Linear, bipolar current source
Current range	-4.5A to +4.5A
Setpoint resolution	1mA
Setpoint accuracy	±10mA
Max. power	36W
Compliance voltage	>8VDC
Current noise	<1mA rms @ 4A output
Current limits
Range	-4.5A to +4.5A, low & high
Accuracy	±5mA

Temperature Sensors
Thermistors	10 to 500 kΩ (sensor bias at
	10 µA, 100 µA, 1000 µA)
RTD	Pt-100, Pt-1000 (1mA sensor bias)
IC voltage sensors	LM335 and equivalent
IC current sensors	AD590, TMP17, and equivalent

Measurement & Display
Temperature
Range	-150 °C to +250 °C
Resolution	0.001 °C
Thermistor
Range	0 to 500 kΩ
Resolution	0.01%
Accuracy	0.03%
TEC current
Range	-4.5A to +4.5A
Resolution	1mA
Accuracy	±10mA
TEC voltage
Range	-9V to + 9V
Resolution	1mV
Accuracy	±10mV (4 wire)

General
Instrument connectors	DB9-F (laser diode), DB15-F (TEC)
	BNC (modulate, trigger output)
Remote interfaces	GPIB (IEEE488.2), RS-232, Ethernet
Power	100 to 120VAC, 220 to 240VAC,
	50 Hz/60 Hz, 100W
Dimensions	7" × 5" × 15" (WHL)
Weight	15 lbs.
Warranty	One years parts and labor on defects
	in material and workmanship

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