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107
Tunable Laser Sources
How to Set the Wavelength
Every Tunable Laser module has a permitted wavelength range.
This range is greater than the specified range. The permitted
wavelength range varies for each Tunable Laser module. You can
set the wavelength to any value within the permitted wavelength
range.
Figure 5-6 shows an example of specified and permitted wavelength
range.
How to Set the Wavelength Directly
You can set a constant wavelength.
To set the wavelength to 1545.500 nm:
1
Move to the Tunable Laser channel.
2
Move to the wavelength parameter, [
λ],
and press E
NTER
.
3
Enter 1545.500 and press E
NTER
.
How to Set a Relative Wavelength
You use a relative wavelength for heterodyning, for example, when
you are measuring the linewidth of DFB (distributed feedback)
lasers.
The output wavelength,
λ,
is set from the base wavelength,
λ
0
, and
the frequency offset, df. The formula for calculating the output
wavelength is:
where c is the speed of light in a vacuum (2.998
×
10
8
ms
−
1
).
Figure 5-6
Specified and Permitted Wavelength Range
λ [
nm
]
Specified Range
Permitted Range
1460
1580 1600
1450
Not to Scale
Summary of Contents for 8163A Series
Page 1: ...HP 8163A Lightwave Multimeter HP 8164A Lightwave Measurement System User s Guide ...
Page 3: ...HP 8163A Lightwave Multimeter HP 8164A Lightwave Measurement System User s Guide ...
Page 13: ...13 Safety Summary ...
Page 25: ...1 1 Getting Started ...
Page 49: ...2 2 Additional Features ...
Page 61: ...3 3 Power Measurement ...
Page 76: ...76 Power Measurement How to Measure Power Figure 3 8 Manual Range Mode Within Range ...
Page 87: ...4 4 Laser Sources ...
Page 94: ...94 Using Laser Source Modules How to Use Laser Source Modules ...
Page 95: ...5 5 Tunable Lasers ...
Page 99: ...99 Tunable Laser Sources How to Set the Power Figure 5 1 Setting High Power parameters ...
Page 103: ...103 Tunable Laser Sources How to Set the Power Figure 5 3 Setting Attenuation ...
Page 130: ...130 Tunable Laser Sources How to Use Auxiliary Functions ...
Page 131: ...A A Installation and Maintenance ...
Page 159: ...B B Accessories ...
Page 167: ...C C Specifications ...
Page 175: ...D D Performance Tests ...
Page 188: ...188 Performance Tests Test Record ...
Page 192: ...192 Performance Tests Test Record ...
Page 193: ...E E Cleaning Procedures ...
Page 199: ...F F Firmware Updates ...
Page 204: ...204 F Firmware Updates Firmware Update Process ...