Jose Luis Sirvent
Supervisor: Jonathan Emery
Student Meeting
24 October 2011

1. Status

2. Contact with companies

3. Simulations with zemax

4. Comparation

A) Initial analysis and new approaches
Collimating
Lens
Focusing
Lens
SMA905
Connector
50 um
Feedthrough
`
`
Focal Lengh
ROTATING
Disk with
reflective patern
(50um)

B) Search of new components
◦ Collimators (4) , Focusers (2)
◦ Circulators (5), cables, adaptators

C) Initial Estimations of losses
◦ Study of possible limiting effects
 Fresnel, Franhouer diffraction
 Interferences
 Fresnel reflection
 Light Coupling efficiency
 Estimate maximal separations
◦ Initial comparations in terms of power coupling
Distance Fiber-Disk VS Losses in Free Space (Transmission and Reflection)
40
Free Space Losses (dB)
LOSSES (Lc)
Transmission Reflection Reflection (Collimator)
Fresnell Disk-Vacuum
0.315283993
0
0.630567985dB
Fresnell Fiber-Vacuum
0
0
0dB
Insertion Losses ST 0.35
1.4
2.1
2.1dB
Insertion Losses SMA 1*2
2
2
2dB
Optical Fiber
1.75
1.75
1.75dB
Free Space
28.3017246927.7690803
5.953030906dB
Splitter 10/90
0
2.2
2.2dB
Total Losses
33.7670086933.6190803
12.43359889dB
Pr
0.04%
0.04%
5.71%Ps
35
30
25
20
15
10
5
0
Transmission
Reflection
Reflection
(Collimator)

A) Meeting with VaqTec
◦ Fibers for Vacuum
◦ Custom Lenses?
◦ Aligners XYZ and angular

B) Contact with AccuGlass
◦ Lenses & Collimators for Vacuum
 Characteristics and models
◦ Fibers for Vacuum
◦ Feedthroughs

Lensed fibers:
◦
◦
http://www.laseoptics.com
http://www.corning.com


Vacuum Optical Components:
◦
http://www.plasus.de/index.php?page=system_optikkomponenten&lang=en


Others Factories:
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
◦
http://www.thorlabs.de
http://www.vacom.de/
http://www.newport.com
http://www.hellma-analytics.com
http://www.accuglassproducts.com
http://www.edmundoptics.com/
http://www.multimodefo.com
http://www.oceanoptics.com
http://www.horiba.com
http://slwti.com/
http://www.ofr.com
Http://www.agiltron.com
Http://www.fiberw.com
Http://www.dpmphotonics.com
Http://www.acphotonics.com
http://www.lasercomponents.com

1. Intro:
◦ Optical simulation software
package.
◦ Simulation under geometric
and physic optics approach.
◦ Simulation of fiber coupling
efficiency.
◦ Interferences and diffractions
◦ Lens modeling and validation.

3.1 Initial simulations:
◦ 3.1.1 Transmission approach
 Coupling efficiency: 0.15%
 Distance limit: 1.5 mm
 < Fresnell distance
 Coupling 0.08%

3.1 Initial simulations:
◦ 3.1.2 Reflection approach
 Coupling efficency: 0.27%
 Distance limit: 2mm
 < Fresnell distance
 Coupling 0.08%

3.1 Initial simulations
◦ 3.2.3 Double Pattern approach





Wavelenth: 850nm & 1550nm
Disks Thickness: 1mm
Pattern used: 50um (Both positions On & Off)
Distance Between Disks: Variable
Screen distance: 1mm

3.1 Initial simulations
◦ 3.2.3 Double Pattern
approach:
 In account 2 conditions
 A) Transmission
 B) Reflection

(Perfect reflection)

3.1 Initial simulations
◦ 3.2.3 Double Pattern approach (Transmission)

3.1 Initial simulations
◦ 3.2.3 Double Pattern approach (Reflection)

3.1 Initial simulations
◦ 3.2.3 Double Pattern approach
 Transmission 850nm (Absorption 92%)
 Reflection 850nm (Reflexivity 60%)

3.2.4. Focusing the beam
◦ Initial results with lenses.
◦ A) Usage of Double Convex lenses:
 Edmund Optics has Possible Lenses which could fit
in Accu-Glass Collimator.
 Initial Simulations are showing errors in focusing
distances.
◦ B) Usage of plano-convex lens combination:
 Two collimators from Accu-Glass faced
 Necessity of cutting one of them
◦ C) Using Defocusing defect:
 Accu-Glass Collimator as a Focuser
Transmission
Reflection
Reflection (Collimator)
Fresnell Disk-Vacuum
LOSSES (Lc)
0.315283993
0
0.630567985
dB
Fresnell Fiber-Vacuum
0
0
0
dB
Insertion Losses ST 0.35
1.4
2.1
2.1
dB
Insertion Losses SMA 1*2
2
2
2
dB
Optical Fiber
Free Space
Splitter 10/90
Total Losses
Pr
Power Balance
Ps
Pr
1.75
1.75
1.75
dB
28.30172469
27.7690803
5.953030906
dB
0
2.2
2.2
dB
33.76700869
33.6190803
12.43359889
dB
0.04%
0.04%
5.71%
Ps
Transmission
Reflexion
Reflection (Collimator)
5
5
5
mW
6.989700043
6.98970004
6.989700043
dBm
0.002100241
0.00217301
0.285502631
mW
-26.77730864
-26.62938
-5.443898848
dBm
Free space loses comparing initial with Zemax (dB)
Transmission
Reflection
Double pattern
Initial
28.3
27.7
5.9
Zemax
28.2
27.9
5.68