In the following note, the LUNA OVA calculations for GD and CD are presented, along with a straightforward way for the user to calculate these parameters, starting from the OVA optical phase measurement, with a user-defined optical frequency derivative step size. Example measurements are included that illustrate these calculations and practical considerations. Click here to download the full article
Lambda News
Lambda is a leading supplier of characterisation, measurement and analysis equipment, applied to signals from DC to Light. Our company provides hardware, software and integrated solutions throughout the UK & Ireland.
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Optical Backscatter Reflectometer (OBR) Skew and Strain Measurements
LUNA’s Optical Backscatter Reflectometer (OBR) has the ability to make long distance length measurements of up to 2 kilometres. This engineering note gives users step by step guidance on using the OBR to obtain skew and strain measurements. Click here to download the full article -
Test Summary: Spool Skew and Strain Measurements with the OBR
A series of tests were performed by Luna to demonstrate the capability of the Optical Backscatter Reflectometer (OBR) as a tool for optical fiber spool characterization. This engineering note discusses skew and strain measurement results from these tests. Click here to download the full article -
Chirped Fibre Bragg Grating Measurements with the Optical Backscatter Reflectometer (OBR
This engineering note outlines the capabilities of the Optical Backscatter Reflectometer (OBR) 4600 in characterising a chirped fibre Bragg grating (FBG). Data taken with the OBR instrument on a chirped FBG are presented and several competing technologies are mentioned. Click here to download the full article -
Choosing a Mode Conditioner for Use with the Optical Backscatter Reflectometer (OBR) in Diagnosing Multi-Mode Fibre
Luna’s Optical Backscatter Reflectometer (OBR) is ideally suited for troubleshooting both single mode and multi-mode optical networks. This engineering note details the advantages and disadvantages of three methods of mode conditioning: 1) direct launch method 2) full equilibrium mode launch 3) partial mode launch. Click here to download the full article -
Using a Circulator to Make Insertion Loss Measurements in Transmission with the Optical Backscatter Reflectometer (OBR)
LUNA’s Optical Backscatter Reflectometer (OBR) is well suited for making localised Insertion Loss (IL) measurements in reflection using the differences in fibre Rayleigh scatter amplitude on either side of a loss event. This engineering note details how the use of a circulator can allow the user to measure the total IL of their Device Under Test (DUT) in transmission. Click... -
Using the Optical Backscatter Reflectometer (OBR) with Multi-Mode Fibre
This engineering note details two methods of coupling light from single mode fiber to multi-mode fiber to produce stable and repeatable Insertion Loss (IL) and Return Loss (RL) measurements with LUNA’s Optical Backscatter Reflectometer (OBR). This note also discusses the differences between IL and RL results for the two mode launch conditions and details the consequences for OBR spatial resolution... -
Computing Insertion Loss when Transitioning Through Dissimilar Fibre with the Optical Backscatter Reflectometer (OBR)
LUNA’s Optical Backscatter Reflectometer (OBR) is ideally suited for measuring Insertion Loss (IL) and Return Loss (RL) in optical networks with extremely high spatial resolution. This engineering note details how to properly compute insertion loss by measuring the relative difference in scatter levels. Click here to download the full article -
Characterising the Optical Properties of Planar Waveguides, Optical Chips and Planar Light Circuits
Overview Planar optical waveguide technologies are the key elements in the modern, high speed optical network. Recent broad deployment of optical and hybrid optoelectronic chips and planar light circuits (PLCs) has been driven by the cost, size and operational benefits that these architectures offer. From a measurement perspective, planar optical waveguide architectures offer several unique challenges. Even the highest quality... -
New world-record wavelength range configurations for Photon RT
EssentOptics, a leading producer of UV-VIS-MWIR spectrophotometers for optical coaters, sets a new benchmark for the effective wavelength range of this type of spectrophotometer instrument and announces the expanded Mid Wave IR (MWIR) range configurations for its Photon RT spectrophotometers. By Mid-wave Infrared (MWIR) we are referring to the 3 to 5 µm atmospheric window which is typically covered by detectors...