2000 nm Fiber Isolator
Chapter 3: Description
Rev B, Sept. 14, 2018
Page 3
Chapter 3 Description
Fiber isolators protect light sources from back reflections and signals that can
cause intensity noise and optical damage. Optical isolators, also known as
Faraday isolators, are magneto-optic devices that preferentially transmit light in
the forward direction while absorbing or displacing light propagating in the
reverse direction.
This
Thorlabs’ polarization-dependent isolator is compatible with polarization
maintaining (PM) fibers. There is 0.8 m to 1.0 m of fiber built in to each side of
the isolator, and an arrow engraved on the body indicating the transmission
direction. In addition, each unit is tested before shipment to ensure compliance
with our specifications and a complete test report comes with every serialized
part.
An isolator consists of a Faraday rotator, at least two polarizers, a half-wave
retarder and collimating lenses.
The main body of the isolator contains the Faraday rotator, polarizers and
retarder. The outer aluminum sleeves protect the input and output ports
containing the collimating lens and fiber ferrule.
This isolator is mounted on a baseplate with two 4-40 (M3) counterbored slots for
securing the unit to a breadboard or optical table. This base may be removed by
the user if desired. However, do not remove the lid as this is considered
disassembling and will void the warranty.
Part Number
The part number consists of the following:
IO
(The Isolator Code)
Letter
o
Polarization dependence (F/K
– Independent; J/L – Dependent)
o
Maximum Power Level (F/J
–3W CW max; K/L - 10W CW max)
Center Wavelength
(nm)
Example:
The
IO-L-2000 isolator is a polarization dependent fiber isolator
with a max power level of 10 W (CW) and a center wavelength of 2000 nm.
