Laser material processing laboratory develops valuable experimental protocols for managing glass based photonic structures. Among the others we evidence the smoothing of planar waveguide surface in order to reduce scattering losses and the fabrication of transparent glass ceramic waveguides.
Instrumentation:
Laser CO2 TEA S50 made by BCC LLC Bulgaria
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Figure 1: TEA CO2 laser system for laser material processing |
Technical Data:
Gas mixture |
CO2 33%, He 33%, N2 33% |
Energy per pulse |
0,8 Joule in Multimode, 150 mJ TEM00 |
Pulse length |
typically 380 nsec = 2 MW for pulse |
Repetition rate |
from 1 Hz to 100 Hz |
Beam dimension |
15mm x 15mm in multimode
8 mm in TEM00 |
Divergence |
3,5 mrad in Multimode
1,3 mrad in TEM00 |
Time for ready |
10 - 15 min |
Max energy consumption |
4KW |
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Figure 2: Optical bench for CO2 laser material processing
(a) beam output (b) beam collimator (c) lens (d) sample holder
(e) power meter head S314C (f) power meter electronic PM100D |
Lens:
N.2 ZnSe lens plano-convex
OPHIR - LP 38-127-3.0 |
Diameter: 38.1 mm (1.5"), Focal length: 127.0 mm (5.0"), Edge thickness: 3.0 mm
Standard coating (transparent, A < 0,2%) |
N.2 ZnSe Cylindrical Lens
ULO Optics - 15ZCP100 |
Diameter: 38.0 mm, Focal length: 100.0 mm, Edge thickness: 3.0 mm
Coating AR/AR
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Power meter:
- Thorlabs Optical Power Meter PM100D
- With Thermal Sensors for General Applications - S314C and S302C
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S314C |
S302C |
Wavelength Range |
0.25 - 11 µm |
0.19 - 25 µm |
Power Range |
10 mW - 40 W |
100 µW - 2 W |
Detector Type |
Thermal Surface Absorber |
Stabilized Thermal Absorber |
Resolution |
1 mW |
1 µW |
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Figure 3: Power meter PM100D |
Tapered fiber fabrication setup
Tapered fiber is one of the more frequently used methods to inject the light in a microresonators. The typical example is the add-drop configuration used for spherical microresonators. Hence is crucial to develop the skill in the artisanal fabrication of the tapers. Using the home-made setup shown in Figure 4 tapered fibers with a 1 µm waist can be prepared.
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Figure 4: Tapered fiber fabrication setup |
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