posted Jun 15, 2013, 9:38 PM by Sensorica Group
updated Jun 17, 2013, 11:43 PM by Tiberius Brastaviceanu
| Optical fiber preparation|
We used Infinicor300 glass fiber, 125/62.5, MM from Corning. The fiber was cut in approx. 10cm pieces. A portion was stripped from its jacket closer to one tip, and cleaned with alcohol. The stripped portion was placed within the processing region within the microsplicer (see next row below) to be pulled. The jacket on both sides of the stripped region is necessary for a better grip in the two clamps of the microsplicer.
| Microfiber pulling|
The microsplicer was powered at 9.0V and max current by an adjustable power supply. The current and timer of the microsplicer were both set to 1. During plasma discharge (fuse function) one side of the fiber was manually pulled using one of the two micrometers on the microsplicer. This procedure was repeated a few times, until a microfilament of approx. 2 to 4 mm in length and around 20 microns in diameter was obtained. The
transducers are made manually, therefore there is a lot of variability
from one to the other, in terms of their diameter profile. We used the
microsplicer +/- 5 microns. The tip was rounded by gently melting the fiber at lower voltage.
| Fiber tip preparation |
The tip was coated with silver using our in-house method. Coating was performed in a drop, without mixing and at room temperature. Two treatments were applied for every fiber.
After silver coating, the tip was plunged into a clear poxy that is usually used to fuse PMMA fibers together in order to stabilize the silver coating.
microfiber under bending, done in SENSORICA lab, using Prototype I