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App-9
IM AQ6373-01EN
Appendix
1
2
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9
10
11
App
Index
When “TYPE” is PEAK.
L
0
L
1
L
A
L
C
L
B
Lp
Lp-TH
L
min
• Obtain the minimum level “LGmin.” Also, set the wavelength of this point to λmin.
• Obtain LG0 at the peak level (LOG) on the left of LGmin. Also, set the wavelength of
this point to
λ
0.
• Obtain LG1 at the peak level (LOG) on the right of LGmin. Also, set the wavelength of
this point to
λ
1.
• Of LG0 and LG1, set whichever is greater to Lp.
• Between
λ
0 and
λ
1, set the leftmost wavelength crossing the level (LOG) of |Lp-
threshold value (THRESH[dB])| to
λ
A.
• Between
λ
0 and
λ
1, set the rightmost wavelength crossing the level (LOG) of |Lp-
threshold value (THRESH[dB])| to
λ
B.
• Obtain
λ
A and
λ
B through multiplication by the value which is set to the multiplying
factor K.
λ
'C = (
λ
B +
λ
A)/2
λ
A = K × (
λ
A -
λ
'C) +
λ
'C
λ
B = K × (
λ
B -
λ
'C) +
λ
'C
• Obtain the NOTCH width from the following equatio.
Δλ
=
λ
A -
λ
B
• Obtain the center wavelength
λ
C from the following equation.
λ
C = (
λ
A +
λ
B)/2
Appendix 1 Data Calculation Algorithms for Spectrum Widths