4308-QCW Laser Controller
The 4308-QCW LaserSource provides up to 8A of current, with excellent noise and accuracy specs. The 4308-QCW is an excellent choice for high power fiber pigtailed devices and other applications requiring up to 8A. The 4308-QCW supports both CW and Quasi-CW (QCW) mode.
Simple User Interface
The 4308-QCW’s user interface is remarkably simple… so easy to use, you’ll have it up and running in no time. Unlike other instruments which rely on 7-segment LED displays and a confusing array of indicators and buttons, the 4308-QCW instead presents the information on a high contrast VFD display in an easy-to-read format. The 4308-QCW displays current, voltage, and photodiode current simultaneously… no need to toggle though the readings like on most instruments. Settings and error messages are in clear English, not cryptic codes and flashing status lights.
Quasi-CW (QCW) Mode
The 4308-QCW includes QCW mode, a feature not found in most other laser drivers in its class. Many applications require the low duty cycle, high current pulses that QCW offers to manage thermal loading on the device. With rise times of less than 20µs, and pulse widths as narrow as 100µs, the 4308-QCW offers an effective and low-cost QCW solution. If you are looking for the non-QCW driver, see the 4308 LaserSource.
Specifications
| CW Mode Specification | |
| Laser current | |
| Range(mA) | 0~8,000 |
| Resolution(mA) | 0.5 |
| Accuracy(±[% set=mA]) | 0.05% +1.6 |
| Stability(ppm, time) | <10, 1 hour |
| Temperature Coeff(ppm/°C) | 50 |
| Noise/Ripple(µA rms) | <60 |
| Transients(uA) | <600 |
| Compliance Voltage(V) | 5 |
| Modulation Bandwidth(kHz) | 40 |
| Modulation Input Range | 0 ~ 10V, 10kOhm |
| Photodiode Current | |
| Range(µA) | 25~20,000 |
| Resolution(µA) | 1 |
| Accuracy (±[% set + µA]) | 0.05% + 2 |
| Stability(ppm, time) | <200, 24 hours |
| Temperature Coeff(ppm/°C) | <200 |
| PD Bias(V) | 0~-5V, Software progrannable |
| Laser Voltage | |
| Range(V) | 0~4 |
| Resolution(V) | 0.001 |
| Setpoint Accuracy (±[% set + V]) | 0.05% + 0.005 |
| Measurement Accuracy((±[% reading +V]) | 0.05% + 0.004 |
| QCW Mode Specifications | |
| Laser Current | |
| Range(mA) | 50~8,000 |
| Resolution(mA) | 1 |
| Setpoint Accuracy (±[% set + mA]) | 0.5% + 10 |
| Measurement Accuracy((±[% reading + mA]) | 3% + 16 |
| Laser Voltage | |
| Resolution(V) | 0.01 |
| Measurement Accuracy((±[% reading +V]) | 2% + 0.04 |
| Photodiode Current | |
| Resoluion(uA) | 10 |
| Measurement Accuracy((±[% reading + mA]) | 2% + 100 |
| Pulse Width | |
| Ramge(ms) | 0.1 ~ 600 |
| Resolution(ms) | 0.001 |
| Accuracy(Hz) | 0.015 |
| Frequency | |
| Range(Hz) | 1 ~ 1,000 |
| Resolution(Hz) | 0.1 |
| Accuracy(Hz) | 0.5 |
| Duty Cyle | |
| Range(%) | 0.1-90 |
| Resolution(%) | 0.1 |
| Rise/Fall Times(us) | <20/<10 |
| Overshoot(%) | <7 |
| Zero Current(% of set) | 7.5 |
| Limits | |
| Current Limit Accuracy(mA) | 80 |
| Voltage Limits Accuracy(+/- % FS) | 2.5% |
| General | |
| Display Type | 20 x 20 VFD |
| Laser Connector | DB-9, female |
| Photodiode/Interlock | On LDD connector |
| Computer Interface | USB 2.0 Full speed(Type B), RS232 |
| Input power | 100V/120V/230V, 50/60Hz |
| Dimension (H x W x D)[mm] | 89 x 215 x 305 |
| Operating Temperature | +10°C to +40°C |
| Storage Temperature | -20°C to +60°C |
