Gaussian Beam Propagation
Measurement method:
Generic
Chopper
Pinhole
Razor Blade
---
Data from one blade scan:
accept this data
Radial position of spot on chopper wheel
mm
cm
in
Number of chopper teeth on wheel
Diameter of pinhole
μm
mm
cm
in
Period of square wave
ns
μs
ms
s
risetime measured from
% to
%
treat wavelength as unknown
λ:
nm
Select Wavelength
Doubled YAG (532 nm)
HeNe (632.8 nm)
Nd:YAG (1064)
Units for data:
[distance from laser:
[position in
mm
cm
in
]
[blade transverse position in
μm
mm
cm
in
]
[rise time in
ns
μs
ms
]
[pulselength in
ns
μs
ms
]
[radius in
μm
mm
in
]
Beam parameters from curve fit:
