- Interfaces: Hard-wire (DB25)
- Rise time: 1µs (G≤5×105); 4µs (higher gains)
- Bandwidth (-3dB): 350kHz
- Noise equivalent power: 0.5nW
- Gain control: 16 gain ranges in 1-2-5 pattern or
4 gain ranges in decade spacing
PRINCIPLES OF OPERATION
The OPM400 measures optical power via a photodiode. Photodiodes are useful for power measurement in the visible and near infra-red due to their inherent sensitivity and speed of measurement.
Photodiodes produce a current which is proportional to the incident light power over a wide dynamic range. The disadvantage when compared to calorimetric devices is the wavelength dependance. However, for use with monochromatic sources, the detector can be calibrated and the measured current corrected accordingly.
The current from the photodiode is converted to a voltage through a precise transimpedance amplifier. This amplifier is very linear over the full measurement range of the device.
The OPM400 amplifier employs high quality photodiodes and precision transimpedance input stages to provide for low offset and high linearity throughout the full dynamic range.
FIELDS OF APPLICATION
This optical power monitor is particularly useful for the measurement of fibre coupled sources. The output is a voltage linearly proportional to input power. The fast response time at high signal-noise ratio makes this OPM series particularly useful in systems control feedback loops.
The high sensitivity and large dynamic range allow measurement of a wide range of optical sources such as lasers and LEDs alike.
The OPM400 series is insensitive to electromagnetic interference by design, an important factor when working in “dirty” industrial environments.
These units are provided in a modular 19“ rack mount system.
| Parameter | Conditions | Si, InGaAs | Ge | Units | ||||
|---|---|---|---|---|---|---|---|---|
| Input | ||||||||
| Power ranges (full scale) | Maximum range Minimum range | 4.5 (typ) 45 (typ) | 45 (typ) 450 (typ) | mW nW | ||||
| Noise equivalent power (NEPRMS ) | Range: 4.5mW Range: 45nW | 2.5 (max) 0.5 (max) | 25 (typ) 5 (typ) | µW nW | ||||
| Connectors | FC, SMA or ST | FC, SMA or ST | ||||||
| Output | ||||||||
| Function | Linear analogue : Vout = scale x I in | |||||||
| Output range (full scale) | 3.7 (min) | 3.7 (min) | V | |||||
| Output scale with 16 gain range option | Range: Si, InGaAs 4.5mW-45nW Ge 45mW-450nW | 1 (typ) 0.1 (typ) | 0.1 (typ) 0.01 (typ) | V/mW V/nW | ||||
| Output scale with 4 gain range option | Range: Si, InGaAs 4.5mW-450nW Ge 45mW-4.5µW | 1 (typ) 1 (typ) | 0.1 (typ) 0.1 (typ) | V/mW V/µW | ||||
| Connectors | BNC and DB25 | BNC and DB25 | ||||||
| Setting time (1%) | Source capacitance < 100pF | 2 (max) | 2 (typ) | |||||
| Rise / Fall time (10% – 90%) | Source capacitance < 100pF | 1 (max) | 1 (typ) | µs | ||||
| Accuracy | ± 1 (min) | ± 1 (min) | % | |||||
| Output impedance | 50 (max) | 50 (max) | Ω | |||||
| Logic | ||||||||
| Current required for switching | HI=5V LO=0V | – 100 (min) 5 (typ) 100 (max) | – 100 (min) 5 (typ) 100 (max) | nA | ||||
| Switching time | 2 (max) | 2 (max) | µs | |||||
| Power supply | ||||||||
| Type | Wall plug (supplied) | Wall plug (supplied) | ||||||
| Dimensions | ||||||||
| 1 channel | 103 x 106 x 116 (B x H x L) | mm | ||||||
| 4 channel | 103 x 106 x 116 (B x H x L) | mm | ||||||
| 19″ rack modules | 3U | |||||||
- Detector: UV-Si, Ge, visible enhanced InGaAs, IR extended-InGaAs
- Input receptacle: FC-receptacle, SMA-receptacle, ST- receptacle, free beam
- Number of gains: 4, 16
- Case: gull wing, lab style, 19″ rack module
- Number of channels: 1, 2, 3, 4
- Interfaces: USB measurement rate: 30ms to 999s
- Minimum measureable power: 1nW (photodiode)
- Maximum measureable power: 5kW (Integrating sphere)
- Gain control: 5 gain ranges
- Functions: graph and digital display modes, averaging
The OPM150 Power Monitor – Low cost, versatile and small enough to fit into your pocket!
The OPM150 is a versatile power monitor for use in the lab and for laser servicing as well as for OEM applications. This unit is designed for use with a PC only, thus eliminating the need for a display. This makes the OPM150 very economical.
A very wide range of wavelength and powers. What would YOU like?
Various diode materials allow measurement from 250nm up to 2500nm.
Heads are available covering 250-1100nm, 800-1550nm, 400-1600nm, 800-2000nm, 1000-2200nm and 1300-2500nm. Each head is automatically recognized and its individual calibration data are uploaded to the system.
Thus, changing wavelength range is as simple as swapping heads – all with one base unit.
We offer calibrated attenuation filters which extend the range of the free beam heads by up to three orders of magnitude. The user may load up to 5 separate filter curves to expand the dynamic range and functionality of the unit while ensuring proper calibration.
Calibrated integrating spheres compatible to the OPM150 system round up the selection.
With a response time of 100µs and sampling rates up to 600S/s, there is much more to see than with a thermopile sensor. And no thermal drift to worry about either!
The Software – Integration made easy!
The graphical user interface is intuitive to use and easy to read! The software includes a scope function, data logging and a large, digital display – perfect for daily use in the lab or in the field. Further functions such as auto gain and various storage formats are also included.
The OPM150 is small enough to fit into your pocket and is USB powered and controlled. No extra power supply required, no extra cables on the table.
Not only the small size qualifies this instrument for OEM applications. It is very simple and flexible to integrate into your project. The unit comes delivered with drivers for direct communication or to be used as a virtual COM-port. Furthermore, we provide a full software development kit including the source code for the GUI application as well as a demo LabView-VI.
Our philosophy: Make it as simple as possible to use this instrument!
| Order Code | 30.070.00002 | 30.070.00058 | 30.070.00112 | Units | |||||
|---|---|---|---|---|---|---|---|---|---|
| Application | CW and pulsed source > 300kHz | CW | CW and pulsed source > 500Hz | ||||||
| Input | |||||||||
| Max. Current | 12 | 4 | 12 | mA | |||||
| Output | |||||||||
| Connectors | DB9 (detector head) and USB | DB9 (detector head), BNC and USB | DB9 (detector head) and USB | ||||||
| Bandwidth | 10 000 | 100 000 | 5 | Hz | |||||
| Sampling Rate | Standard modes Fast sampling mode | 30 600 | 30 600 | 30 600 | S/s | ||||
| Gain Stages | 1, 10, 100, 1000, 10000 | 1, 10, 100, 1000, 10000 | 1, 10, 100, 1000, 10000 | V/mA | |||||
| Accuracy | Detector | ± 5 | ± 5 | ± 5 | % | ||||
| Accuracy | Base Unit | ± 1 | ± 1 | ± 1 | % | ||||
| Reproducibility | Detector | ± 1 | ± 1 | ± 1 | % | ||||
| Linearity | Detector | ± 0.2 | ± 0.2 | ± 0.2 | % | ||||
| Power supply | |||||||||
| Type | USB | USB | USB | ||||||
| Dimensions | |||||||||
| Basemodule Head | 60 x 81 x 36 mm (W x L x H) 35 x 30 (Φ x L) | 60 x 81 x 36 mm (W x L x H) 35 x 30 (Φ x L) | 60 x 81 x 36 mm (W x L x H) 35 x 30 (Φ x L) | mm | |||||
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