THORLABS Vytran GPX4000LZ, Руководство пользователя

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GPX4000LZ Glass Processor Chapter 5: Operation
Rev I, September 15, 2021
Page 53
5.14.11 Thermal Core Expansion
Thermal core expansion can be accomplished on the glass processors by executing a standard splice with modified
fire polish parameters when using the Filament Heating assembly. To prepare for thermal core expansion, open the
Splice menu and click on the Fire Polish Parameters tab. The typical fire polish parameters for thermal core
expansion of Ø125 µm cladding fiber are shown in Figure 38. For splice loss optimization via this method, the fire-
polish process can be executed multiple times.
For thermal core expansion, the delta, number of passes, and scan velocity need to be optimized to achieve the
best result. Power should be the same or slightly higher than the splice power. Please note: these values are
filament and fiber specific. For further assistance, please contact Thorlabs.
Once these changes have been made, load the fiber with the stripped region centered at the splice head. Click the
"Splice" button, and the glass processor will perform the thermal core expansion.
Figure 38 Editing Fire Polish Parameters in Preparation for Thermal Core Expansion
5.14.12 Fiber Lensing
There are many different types of fiber lensing applications. Some involve splicing a component onto the end of a
fiber, some involve altering the end of a fiber, and some involve splicing a component onto the end of a fiber and
then altering it using the furnace. Users are advised to contact Thorlabs for assistance with these applications.
5.14.13 Mode Adaptors
Fiber laser systems typically employ large-mode-area, double-clad gain fibers that must be coupled to a wide
variety of dissimilar fibers. In order to optimize the signal and/or pump coupling between dissimilar fibers, a mode
adaptor is often used to manage the transition. This technique is rather specialized, and glass processor users
wanting to fabricate mode adaptors are advised to contact Thorlabs for assistance with these applications.