Yenista Optics TUNICS T100S-HP, User Manual

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Enabling Active Wavelength Monitoring
TUNICS T100S-HP User Manual 41
7.2 Performing Wavelength Monitoring
Wavelength
Monitoring
Scheme
The wavelength monitoring scheme consists in a loop-back to the tunable laser of the
wavemeter actual reading, and self-alignment of the tunable laser by iteration process to
achieve the user-defined target wavelength within the wavemeter’s accuracy. In order to
achieve the user-defined target wavelength within the wavemeter accuracy, the following
wavelength monitoring scheme is implemented:
• The wavemeter actual reading loops back to the tunable laser
• An iteration process self-aligns the tunable laser.
Figure 7: Wavelength Monitoring Scheme
Depending on the performance of the wavemeter you are using, the average iteration
time to reach the target wavelength may range from 1.5 s to 2 s.
The following procedure explains how to perform wavelength monitoring of the
TUNICS T100S-HP using a wavemeter.
Procedure 1. Configure the wavemeter remote interface with the following parameters:
• Remote: [On]
• RS-232: [On]
• Baud: [9600]
• Handshaking: [None]
(TUNICS T100S-HP output)
Target wavelength:
λ
t
λ
1
out
TUNICS T100S-HP
Tunable External Cavity Laser
∆λ
n
λ
1
read
λ
n
out
∆λ
1
Wavemeter
λ
n
read
(User-setting)
Target wavelength:
λ
t