THORLABS ULN15 Series, User Manual, Page: 17 / 24

Ultra-Low Noise Laser Chapter 5: Operation
Rev B, October 23, 2020 Page 15
Chapter 5
Operation
The laser performance is sensitive to the temperature of both control loops and to the drive current. Small
differences exist in calibration between instruments. While the plots on the datasheet suggest recommended
operating points, we advise all users to verify that the ULN is in single mode operation at the desired setpoint
using an OSA. Small adjustments may be needed to obtain the required performance.
The ambient temperature has an influence on ULN performance. In most laboratory environments, single-
frequency operation will remain unchanged from the test datasheet. If the case temperature deviates greatly
from 25°C, it may be necessary to reset the laser current and/or T
FBG
to find single-frequency operation.
The ULN is sensitive to both seismic and acoustic vibration. Users should take precaution to decouple any
sources of vibration from the laser. Acoustic damping may be required to obtain optimal performance in
acoustically noisy environments.