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FIBER COUPLED AOM USER MANUAL
FIBER-Q®
APPLICATION NOTE
This short document provides some basic information on using and the G&H Fiber-Q®. Should
you need further details please contact us and we will be happy to help.
Basic Principle:
A radio frequency (RF) signal applied to the piezoelectric transducer generates a travelling
acoustic wave in the bulk material. This acoustic wave produces a refractive index 'grating'.
Incident light is diffracted from this grating.
The amplitude (intensity) of this diffracted light may be controlled by adjusting the applied RF
power.
The acousto-optic interaction also generates an inherent frequency shift (Doppler Effect), such
that the diffracted light has frequency = incident light + RF drive frequency as indicated in the
diagram.
FIBER COUPLED AOM USER MANUAL
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PEC 0205 Issue 1
As part of our policy of continuous product improvement, we reserve the right to change specifications at any time.
Carrier Frequency f
Input light
(Frequency F)
Diffraction order
(frequency F + f)
0 order (Frequency F)
Acoustic Waves
Acoustic Transducer
May 2017
Page 1
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Table of Contents
Summary of Contents for Gooch & Housego FIBER-Q
- Page 1 FIBER COUPLED AOM USER MANUAL FIBER-Q® APPLICATION NOTE This short document provides some basic information on using and the G&H Fiber-Q®. Should you need further details please contact us and we will be happy to help. Basic Principle: Carrier Frequency f...
- Page 2 Heat Sinking Fiber Coupled AOM The stability of our fiber coupled AOM depends on efficient internal heat conduction. For long term use we recommend heat sinking the base of Fiber-Q® package housing as described in the figure below. In order to aid thermal conduction, it is necessary that thermal contact is ensured at the contact surface between Fiber-Q®...
- Page 3 ....................................During operation, it is inevitable, that over time the temperature of the heat sink may rise excessively if passive convection from the heat sink to its environment does not efficiently dump excess heat. Ways to combat this include fans and fins to aid convection, or water cooling. Certainly, a temperature probe on the heat sink during operation will show whether active heat sinking is necessary.
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