Optical Power Meter OPM200

The optical power meter OPM200 is designed for precise, high speed measurement of optical power in the μW to mW range. The output is a voltage linearly proportional to the input power. The gain of the OPM200 is fixed.

Characteristics

Interfaces: DB9 (analogue outputs)
Rise time: 35ns (10MHz)
Noise equivalent power: 1 µW (RMS)
Gain control: none

Description

The OPM200 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

These optical power monitors are particularly useful for the measurement of rapidly changing optical signals. These units have a particularly high bandwidth of 10MHz allowing monitoring of high frequency noise components of many light sources. The output is a voltage linearly proportional to input power. The fast response time at high signal-noise-ratio makes the OPM200 series particularly useful in systems control feedback loops. The OPM200 series is insensitive to electromagnetic interference by design, an important factor when working in “dirty” industrial environments. These units are provided in OEM-style enclosures. The case wings provide for mounting on standard 25mm and 1″ optical table tops and for OEM applications.

Specifications

Parameter	Conditions	Si, InGaAs	Ge	Units
Input
Wavelength range	UV-Si VIS-InGaAs x2.0-InGaAs x2.2-InGaAs	200 – 950 400 – 1600 500 – 2000 800 – 2200	800 – 1600	nm
Power ranges (full scale)		4.5¹	45²	mW
Noise equivalent power (NEP_RMS )		0.3 (max)	3 (max)	µW
Polarization Dependant Loss (PDL)		0.1	0.1	dB
Fibre Type		single mode, multi mode (Ø core ≤ 62.5µm; NA ≤ 0.275)	single mode, multi mode (Ø core ≤ 62.5µm; NA ≤ 0.275)
Receptacles		FC, SMA, free beam	FC, SMA, free beam
Output
Function		Linear analogue : V_out = scale faktor x I_in	Linear analogue : V_out = scale faktor x I_in
Output scale		1	0.1	V/mW
Output range (full scale)		4.4 – 4.6³		V
Connectors		BNC⁴ and DB9	BNC⁴ and DB9
Rise / Fall time (10% – 90%)		35 (max)	35 (max)	ns
Setting time (1%)		100 (max)	100 (max)	ns
Accuracy		± 5 (min)	± 5 (min)	%
Reproducibility		± 0.5 (min)	± 0.5 (min)	%
Linearity		± 0.1 (typ) ± 0.2 (max)	± 0.1 (typ) ± 0.2 (max)	dB
Output impedance		50 (max)	50 (max)	Ω
Power supply
Type		wall plug (supplied)	wall plug (supplied)
Dimensions		30 x 50 x 60	30 x 50 x 60	mm
Dimensions
	1 channel	105⁵ x 45 x 116 (w x h x l)	105⁵ x 45 x 116 (w x h x l)	mm
	2 channels	105⁵ x 66 x 116 (w x h x l)	105⁵ x 66 x 116 (w x h x l)	mm
	4 channels	105⁵ x 106 x 116 (w x h x l)	105⁵ x 106 x 116 (w x h x l)	mm

¹ Linearity guaranteed to 1 mW (0 dBm).
² Linearity guaranteed to 30 mW (15 dBm).
³ Linearity guaranteed to 1 mW (0dBm).
⁴ Adapters for other connector systems available.
⁵ 130 mm including case wings.

Options

Detector: UV-Si, Ge, visible enhanced InGaAs, IR extended-InGaAs
Input receptacle: FC-receptacle, SMA-receptacle, free beam
Case: gull wing, lab style
Number of channels: 1, 2, 3, 4

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Rolf Jaspers