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SUMMARY:Micromachining of optical fibers with a Nd:YAG laser at 532 nm usi
 ng a spatial filter
DTSTART;VALUE=DATE-TIME:20110714T150000Z
DTEND;VALUE=DATE-TIME:20110714T170000Z
DTSTAMP;VALUE=DATE-TIME:20260715T040919Z
UID:indico-contribution-5227@events.saip.org.za
DESCRIPTION:Speakers: Diethelm Schmieder (University of Johannesburg)\nMic
 romachining of single-mode telecommunication fibres (SMF28) was accomplish
 ed with a Nd:YAG laser at a wavelength of 532 nm. The goal of the micromac
 hining process is to machine miniature Fabry-Perot interferometers in the 
 fiber to manufacture fast temperature sensors. To produce micro features b
 y direct machining the laser beam is focused to spot sizes of 30 µm and b
 elow. The different shapes of the micro features are accomplished with sma
 ll apertures in close proximity and in line with the machining lens (focal
  length 24.5 mm). \n\nWe describe the experimental setup and the monitorin
 g process. Two mirrors BB1-E02 were installed at an angle of 45 degrees to
  eliminate the infrared radiation at 1.064 µm. The apertures in line with
  the machining lens are projected onto the fiber\, which was mounted on a 
 three axis translation stage. The apertures could also be projected agains
 t the wall to assure homogeneous illumination. The fiber can be shifted be
 tween the machining area and a camera with 400 x magnification. The images
  are recorded with ProScope software\, stored in a computer and displayed 
 on a screen.\n\nThe focal point is established by generating a white light
  supercontinuum by air breakdown. The centre position on the fibre is foun
 d with the help of the diffraction pattern produced by the fibre. The mach
 ining frequency was 10 Hz and we found the best laser beam powers between 
 1 –  3 mW or 0.1 – 0.3 mJ/pulse. We managed to machine right through t
 he fiber. The machining results will be presented.\n\nhttps://events.saip.
 org.za/event/7/contributions/5227/
LOCATION: Asteria
URL:https://events.saip.org.za/event/7/contributions/5227/
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