OPM300
15Pages

Optoelectronics & Engineering Services Optical Power Monitor with Front Panel Control HIGHLIGHTS • Maximum optical power • Production automation (e.g.: connectorization, pigtailing) • Noise equivalent power (NEPRMS) • Component testing • Rise / Fall time (10% - 90%) linear analogue • Manual control via front panel switches. MEASUREMENT PRINCIPLE The OPM300 series of optical power monitors employs photodiodes to measure optical power. Precision dual transimpedance input stages provide for high common mode rejection and linearity throughout the full dynamic range of the system. FIELDS OF APPLICATION These optical power monitors are particularly useful for the measurement and monitoring of optical power in the standard telecommunications bands. The output is a voltage linearly proportional to power. The fast response time at high signal-noise-ratio makes the OPM300 series particularly useful in systems control feedback loops, such as in fibre alignment systems. The high sensitivity and wide dynamic range allow measurement of fibre coupled lasers and LEDs alike. Artifex Engineering Dortmunder Str. 16-18 26723 Emden, Germany Several options of photodiode material and optical input, including free beam input, make these units useful in a wide range of applications including nontelecom metrology. The OPM300 series is insensitive to electromagnetic interference by design, an important factor when working in „dirty“ industrial environments. Case wings provide for mounting on standard 25mm and 1“ optical table tops and for OEM applications. 19“ rack mounting is also available. mail: info@afx-eng.com http://www.afx-eng.com

ABSOLUTE MAXIMUM RATINGS Si, InGaAs Average Optical Power Temperature Range ORDERING INFORMATION Full order code: Case style: free beam For example, a single channel optical power monitor in a small OEM-style case for monitoring a 650nm SM-fibre coupled diode laser would be ordered as: OPM300GSF1 whereas a single channel optical power monitor in a lab-style case for monitoring up to 10mW of power from a 1064nm MM-fibre coupled Nd:YAG laser would be ordered as OPM300LGS1. For customized systems (mixed diodes or receptacles), please contact us. Small OEM-style case with gull wings for mounting

SPECIFICATIONS Si, InGaAs PARAMETER INPUT Wavelength range extended InGaAs InGaAs Si UV-Si Power ranges (full scale) Noise equivalent power (NEPRMS) Fibre type Polarization Dependant Loss (PDL) single mode, multi-mode (φ core ≤ 62,5 µm; NA ≤ 0.275) Linear analogue Vout = scale x Pin FC, FSMA, free beam Receptacles OUTPUT Function Output range (full scale) Connectors Output scale Rise / Fall time (10% - 90%) Output impedance LOGIC Current required for switching Dead time during change of range Switching time (remote mode) POWER SUPPLY Type Wall plug (supplied) Dimensions DIMENSIONS 1 channel...

CASE STYLES (Lab style)

CASE STYLES 1 to 16 Channels in modular 19" rack system available.

TYPICAL PERFORMANCE CURVES Linearity 0,20 Gain Switching Dead Time (local mode) high sensitivity → low sensitivity low sensitivity → high sensitivity Gain Switching Time (remote mode) sensitivity high → low → high... upper trace: Remote control voltage (HI = high sensitivity, LO = low sensitivity) lower trace: OPM output

APPLICATIONS EXAMPLES The range of applications for optical power monitors is very broad. The OPM series is especially conceived for applications in the manufacturing environment of telecommunications components. Typical applications may be found in measuring: Components: lasers, ASEs, fibre coupled LEDs fibres, connectors, couplers switches, multiplexers, demultiplexers isolators, circulators filters, fibre bragg gratings (FBGs) Parameters: output power optical return loss (ORL) insertion loss polarization dependant loss (PDL) transient behaviour polarization dependant bandwidth (PDBW) In...

INSERTION LOSS Optical Source Optical Source Important parameters: Accuracy Reproducibility * High quality reference cable with documented loss data ** Device Under Test

LINEAR OR LOGARITHMIC? The question often arises as to which signal processing technique is better: an output linearly or logarithmically proportional to the input optical power. The use of logarithmic amplifiers for optical power monitoring results from the large dynamic range of relevant powers. For example, the OPM series can measure from 1mW to 30pW: more than 7 decades of optical power. This dynamic range is far beyond the capabilities of a linear amplifier in a single gain range. However, by breaking the measurement into range subgroups, linear amplifiers can easily cover the same...

THE FRONT AND BACK PANELS (Lab style case shown) Optical inputs (FC/SMA/FB) Range switch Local / Remote switch Analogue outputs Power indicator Interface receptacle Power input receptacle

INSTRUCTIONS FOR MEASUREMENT The OPM300 optical power meter comprises one to four independent measurement channels, depending on the model chosen. Each channel consists of a receptacled fibre optic input (a free beam option is also available), a BNC-output and a gain set potentiometer. These three user interfaces are arranged in logical groups (see „The Front and Back Panels“). To make a measurement, proceed as follows: 1. Turn the unit on. For the most accurate measurement, please allow for a 30 minute warm up before using. 2. Connect an optical source to the desired channel via the...

CONTROL ELEMENTS The range switch is used to set the sensitivity of the unit. Switch Position Range Sensitivity Sensitivity In ..Remote" mode, the range is set via the colour coded logic pins „Rg1" and „RgO" of the interface cable supplied with the unit. The logic is switched using +5 V / 0 V (= digital ground) logic, which may be TTL4. The current drawn at 5 V is typically 14 mA. Rg1 (green) RgO (brown) Range Sensitivity Sensitivity Fine gain control may be realised via the corresponding potentiometer screw for each channel on the back panel. The gain has been set prior to delivery...