8163A/B, 8164A/B, 8166A/B User’s Guide 169
Tunable Lasers 5
How to Perform a Lambda Zero
Performing a Lambda Zero recalibrates the optical wavelength. This
wavelength may drift due to a change in temperature and other
environmental conditions.The regulated wavelength and wavelength
logging data remain accurate, but the sweep may be offset from the
intended range.
A Lambda Zero is automatically performed when the instrument boots or
when an Automatic Realignment is performed.
The 81600B and earlier tunable laser instruments automatically perform a
wavelength zero from time to time. To avoid interruption of your
measurements, you should perform a wavelength zero at a time of your
choice.
The 81602A, 81606A, 81607A, 81608A, 81609A and 819xxA lasers
regulate this more dynamically after warm-up and do not automatically
run wavelength zeroing. It is advisable to run this after warm-up. Also
periodic use, perhaps daily, during continuous operation or if sweeps are
missing points at the ends is recommended.
To perform a wavelength zero:
1 Move to the Tunable Laser channel and press Menu.
2Move to <
λ Zeroing> and press [OK]. You will see the screen in Figure
96 on page -170.
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