ODL-340 Optical Delay Line Module0 pages

Features
Principle
Applications
Optical Delay Line Module
ODL-340
Simple and unique air gap delay mechanism
Max. delay up to 330 psec
Low PDL (< 0.1 dB)
Low insertion variation (<0.6dB)
Delay tuning knob with lock function
Optical time domain effect measurements
PMD compensation experiments
Time division multiplexing
Fiber interferometers
The ODL-340 module uses an air gap method to
generate a delay in the optical signal. The duration of
the delay is controlled by adjusting the position of a
prism reflector so that the optical distance between
the input and the output collimators is varied. The
device allows an adjustment of up to 49.5mm,
corresponding to an optical delay of up to 330ps.
Collimator
Light In
Light Out
ÄL
Prism
Air gap tuning method
A variable optical delay is achieved using the "air gap
tuning method" to vary the path length. Coupled with
santec's linear sliding technique, very high accuracy
delays of 330 psec are possible using the ODL
components.
Delay: t=2ÄL/c, where 2ÄL is the air gap (optical path)
difference, c is the speed of light.
Note: “Delay” is a relative value; absolute delay of the
module is not precisely specified.
SANTEC OPTICAL COMPONENTS
Optical Delay Line Series