General Photonics PSY-201, Руководство пользователя

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PSY-201 User Guide
GP-UM-PSY-201-11 Page 73 of 105
Appendix 6.0 PolaView data display/analysis program
The PolaView data analysis and display software provides real-time graphic display of
polarization state either on a Poincaré Sphere window for viewing SOP traces or on an oscilloscope
window for tracking polarization changes over time.
Measurable polarization parameters are defined as follows:
SOP: State of polarization of light, expressed in normalized Stokes parameters S
0
, s
1
, s
2
,
and s
3
.
The Stokes parameters are related to the electric field by
2
0
2
0 0
y x
E E S
+ =
2
0
2
0 1
y x
E E S
− =
δ
cos 2
0 0 2
y x
E E S
=
δ
sin 2
0 0 3
y x
E E S
=
where δ is the relative phase between the two orthogonal electric field components.
They are calculated from measured values by
⎥
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎢
⎣
⎡
⎥
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎢
⎣
⎡
=
⎥
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎢
⎣
⎡
=
⎥
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎢
⎣
⎡
3
2
1
0
33 32 31 30
23 22 21 20
13 12 11 10
03 02 01 00
3
2
1
0
3
2
1
0
, , ,
, , ,
, , ,
, , ,
V
V
V
V
m m m m
m m m m
m m m m
m m m m
V
V
V
V
M
S
S
S
S
where V
0
~ V
3
are analog output voltages from the polarimeter, M is a calibration
matrix, and S
0
~ S
3
are the Stokes parameters corresponding to V
0
~ V
3
.
The PSY-201 provides normalized Stokes parameters defined as follows:
S
0
is the measured power.
) (
1
1
S norm
S
s
=
) (
2
2
S norm
S
s
=
) (
3
3
S norm
S
s
=
where
( ) ( ) ( )
2
3
2
2
2
1
) (
S S S S norm
+ + =