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General measurement method for optical devices Print

The application notes listed below are the result of the Joint Experimental Activities performed by the 17 members of EURO-FOS consortium and Network, during the 4 years of the duration of the project. They formulate an extremely useful source of on-hands information and consolidated laboratory know-how to the researchers in the domain of photonics communications.

Contributing Institutions: ICCS/NTUA
Summary: The objective of this application note is to explain how to use an optical complex spectrum analyser to correctly measure the phase and power of an optical signal. It describes what the equipment is able to measure and what the limitations are. We report a detailed description of the hardware connections (both optical and electrical), the sequence of parameters that a user must set from the software menu and an explanation on how to read and save the results, such as phase, power or constellation diagram.  
Contributing Institutions: Institut TELCOM/TELECOM ParisTech
Summary: This application note demonstrate the possibility of versatile OLCR technique to characterize different types of photonic devices in term of Chromatic dispersion, Birefringence, Bending losses, gain, etc. Examples are shown on specialty fibers and photonic crystal devices. 
Contributing Institutions: IT
Summary: The objective of this application note is to describe the methods to characterize an optical radio over fibre link and the impairments that affect the propagation.
Contributing Institutions: IT
Summary: The objective of this application note is to show the method for performing optical fibre link characterization based on optical time domain reflectometers (OTDR).
Contributing Institutions: IT
Summary:  The objective of this application note is to explain how to use a single?photon detector module (SPDM), focusing on its main characteristics, its applications and also its limitations. We start with a brief introduction, comparing it with other measurement devices. Next, we explain how to use it on real experiments, and present the main cares and requisites that should be take into account to its correct functioning. Finally, we present its limitations and the main applications. 
Contributing Institutions: IT
Summary:  The assessment of an optical system composed by different optical devices requires having such devices characterized. As such, a detailed characterization of the amplitude, phase and polarization properties of optical devices is frequently performed on optical laboratories and even on field. In this application note, we explain how an optical network analyser (ONA) can be employed to perform a comprehensive characterization of a wide range of optical devices. We start by explaining the operation principle of the ONA. The setup parameters are introduced afterwards. General measurement tips & tricks are introduced before focusing common optical devices. Finally, the role of the ONA in the writing process of fibre Bragg gratings (FBGs) is discussed. Tips & tricks are given for analysing common FBG profiles. 
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