JDS Uniphase RM3750 Output Port, Internal Light Sources, Hybrid Jumpers, Coherence Length

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RM3 SERIES BACKREFLECTION METER

USER’S MANUAL

Output Port

The output port of the RM meter is equipped with an ultra-low backreflection APC connector. To prevent damage to the output port connector, a measurement jumper must be used for all measurements, even for measuring a component with an APC connector.

Internal Light Sources

The RM meter can be equipped with two internal laser sources. These are thermoelectrically cooled for added stability and are modulated at 10 kHz. Fast changes in ambient temperature can cause a source to become unstable. If this occurs, the meter automatically switches to a measuring mode in which Pin and Pdark are measured more frequently than every minute and the message “Source Unstable” is displayed. The light source power is monitored, and the meter returns to the standard measurement mode when the source has stabilized.

Hybrid Jumpers

The RM meter is supplied with a hybrid measurement jumper and a hybrid calibrated jumper. The measurement jumper has an APC connector at the input end. The other end on the standard measurement jumper is PC, but by changing measurement jumpers this end is user- selected, to be compatible with the input connector of the DUT. The calibrated jumper has an APC connector at the input end and a PC connector at the output end.

Use the measurement jumper for measurement purposes only; use the calibrated jumper for calibration purposes only. The calibrated jumper has a label attached to it identifying it as the calibrated jumper.

Coherence Length

Reflected light from multiple reflections can change the backreflection measured by the RM meter. This variation typically shows up as noise or drift in the signal. The internal light source is designed to have low coherence length (typically less than 10 cm). Thus, interference effects are typically seen only between very closely spaced components such as non-contacting connectors.

Electrical Requirements

The RM meter is supplied with a rechargeable battery. When fully charged, the battery provides up to eight hours of operation at room temperature. For laboratory use, use the RM meter with the power cord. The letter B is shown on the RM meter front panel display when the battery power is low.

Key Features

•Backreflection measurements to -75 dB for single mode model (-40 dB for multi mode model)

•Power measurements to -80 dBm for single mode model (-60 dBm for multi mode model)

•Convenient foot pedal for data logging

•MCTS application software

•Built-in light sources at 850, 980, 1310, 1480, 1550, 1625, or 1650 nm

•Compensation for extraneous backreflection for accurate backreflection measurements

10112341 Rev 002

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Contents User’s Manual RM3 Series Backreflection MeterContents Programming Guide Customized Features and Test DataSafety Information Safety Information, Instructions, and SymbolsClass Laser Product Before Initializing and Operating the Unit Safety InstructionsOperating the Unit RM3 Series Backreflection Meter USER’S Manual Symbol Safety SymbolsProceeding CE Compliance ComplianceFDA-CDRH Compliance CSA / IEC Compliance RM3 Series Backreflection Meter USER’S Manual General Information General Information and SpecificationsBackreflection Measurements Loss and Power MeasurementsOutput Port Key FeaturesInternal Light Sources Hybrid JumpersOptional Accessories Standard AccessoriesApplications Parameter Specification Single-mode Multimode SpecificationsFlexcor is a trademark of CorningR Physical ElectricalEnvironmental Before Initializing and Operating the Unit Getting StartedInitial Inspection Storing and Shipping Operating EnvironmentCleaning Connectors Connector Cleaning connector type can vary Powering Up the MeterFront Panel Operating and Maintenance InstructionsKey/LED Description Termination Techniques Rear PanelComponent Function Termination Techniques for Single-mode Fiber except 980 nmMeasuring Backreflection for Single-mode except 980 nm Backreflection Measurements Setting Up the Meter for Backreflection MeasurementsMeasuring Backreflection Setting Up the Meter for Loss and Power Measurements Loss and Power MeasurementsBackreflection Accuracy and Range Loss and Power Measurements Measuring PowerMeasuring Absolute Power Measuring Relative Power Insertion LossMessages and Symbols Data Logging Using the Foot PedalPower Accuracy Display DescriptionStabilizing Calibrating the MeterPower Calibration Adjustment Backreflection Calibration AdjustmentCleaning the Connector Ends Cleaning the UnitMaintaining the Meter Replacement of Internal Fuses Recharging the BatteryTroubleshooting Long Cables for single mode model only, except 980 nm model Front Panel ConnectorsLoss Before the DUT Reflections Before the DUTLaser Stability Other Display Problem SolutionCalibration Up the Meter for BackreflectionName Symbol Pin Number Signal Direction RS232 Interface SpecificationsProgramming Guide RS232 Serial InterfaceCommand Action Switch Setting Meaning Left Dip SwitchRight Dip Switch RS232-GPIB ConverterRS232 Interface Program Example Programming ExamplesCustomized Features and Test Data

RM3750 specifications

The JDS Uniphase RM3750 is a cutting-edge optical spectrum analyzer that has garnered attention in various telecommunications and photonics applications. Renowned for its versatility and accuracy, the RM3750 combines advanced technologies to provide users with unprecedented measurement capabilities, making it an essential tool for researchers and engineers working in fiber optics, laser development, and spectral analysis.

One of the standout features of the RM3750 is its wide dynamic range. This feature allows users to obtain precise measurements across a broad spectrum of optical signals, which is crucial in environments where signal strength can vary significantly. The analyzer is designed to handle both high-intensity signals and weak optical events, ensuring that no detail is missed during analysis.

The RM3750 incorporates a high-resolution detection mechanism that enables it to distinguish closely spaced wavelengths. This characteristic is particularly beneficial in applications where wavelength spacing is minimal, such as in dense wavelength division multiplexing (DWDM) systems. The high resolution also allows for accurate characterization of spectral features, including signal peaks and noise.

In addition to its impressive measurement capabilities, the RM3750 supports advanced analysis and real-time monitoring. Users can visualize spectral data through an intuitive graphical interface, which aids in the quick interpretation of results. The instrument is equipped with real-time data processing capabilities, allowing users to observe changes in optical signals as they occur, a critical feature for dynamic environments like live signal monitoring.

The JDS Uniphase RM3750 is not only about hardware; it also comes with an array of software tools designed to enhance functionality and ease of use. These tools allow for automated measurements, data logging, and integration with other laboratory instruments. Moreover, the ability to export data in various formats facilitates easy sharing and analysis across platforms.

Another notable characteristic of the RM3750 is its compact design and robust build quality. This ensures that it can operate effectively in demanding laboratory conditions while being portable enough for field applications.

In conclusion, the JDS Uniphase RM3750 optical spectrum analyzer stands out for its combinations of wide dynamic range, high resolution, real-time monitoring, and user-friendly software integration. These characteristics make it an exceptional tool for professionals in telecommunications and optical research, enabling them to conduct more accurate and insightful measurements.
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