VIAVI Solutions
Data Sheet
VIAVI
Semiconductor Optical Amplifier
(SOA) Module
Part of the MAP Series General Purpose mSRC-C family
Key Benefits
y > dB of small signal gain in
the O-band.
y Saturated output power > dBm.
y Operating range from to
nm with minimal spectral ripple.
y Polarization independent input.
y Temperature stabilized features.
Applications
y Testing LR and LR GE, GE
and GE interfaces.
y RX overload and recovery testing.
y Broadband light source for passive
component testing.
Safety Information
y When installed in a MAP chassis, the
module complies with CE, CSA/UL/
IEC, LXI Class C requirements,
meets the requirements of Class B
in standard IEC (), and
complies with CFR . except
deviations per Laser Notice No. ,
July .
The Multiple Application Platform (MAP) O-band Optical Amplifier
(mSRC-CSA/mSRC-CSA) is a single or dual channel,
polarization-independent semiconductor optical amplifier (SOA).
It is a specialized variant of the mSRC-C family of stabilized
semiconductor light sources.
As loss requirements for 100GE, 200GE
and 400GE transmission continue to
decrease, optical amplifiers have become
a critical element in the test automation
tool kit, alongside attenuators, power
meters and switches. There are three key
reasons that require amplification in a
manufacturing test system:
y The base test system automation and
the use of attenuators, switches, and
mux/demux optics create path losses
that exceed the path loss allowance.
y The reference transmitter power is not high enough to
achieve an overload condition.
y Tests in manufacturing might be performed in loopback
mode, and the DUT TX does not have enough power to
achieve overload and guarantee interoperability.
The mSRC-C23000SA and mSRC-C23300SA and provide
enough gain to overcome these issues and ensure receivers
can be verified over their full dynamic range.
INVISIBLE LASER RADIATION
DO NOT VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS
CLASS 1M PRODUCT
(IEC 60825-1
Semiconductor Optical Amplifier (SOA) Module
The bandwidth of the amplifier can support the
wavelengths used in the LR4 and LR8 interfaces.
When set to the disabled state, the amplifier can
provide > 50dB of attenuation and effectively
isolate an individual carrier.
Functional Description
The SOA is mainly used to amplify an optical
signal directly without the need to convert
it to an electrical signal first. The use of the
semiconductor as a gain medium increases the
optical launch power to compensate for losses
in the optical system. Integration of the VIAVI
mSRC-CSA/mSRC-CSA require the
use of additional optical modules. Figure and
Figure provide implementation examples. A VOA at the input ensures that the launch power into the SOA is far
from saturation. The VOA also ensures the best noise figure by allowing the amplifier to operate at . Optical
switches and mux/demux optics automate loopback and eye-mask measurements.
Figure shows a system that enables either an individual lane to be extracted and tested or a loopback test to be
performed. This implementation improves eye-mask measurements, with minimal disruption to the loopback test.
Figure shows the use of four amplifiers to amplify each lane individually. This implementation allows for
overload testing.
If eye-mask or power
measurements per lane are
required, three of the amplifiers
can be set to the disabled state to
block unwanted carriers.
In both implementations, care
must be taken to ensure minimal
return loss at all connection points.
Most importantly, ensure that
all conditions necessary for safe
handling and operation are met
while working with
optical amplifiers.
TX
(Reference)
mVOA-C1
Variable
Attenuator
mVOA-C1
Variable
Attenuator
mSRC-C23000SA
O-Band
Semiconductor
Amplifier
mOSW-C1
Optical
Switch
mUTL-C1
LR4/LR8
Demux
mOSW-C1
Optical
Switch
RX
(DUT)
Figure 2 - The amplifier is used to improve eye-mask measurements
mVOA-C1
Variable
Attenuator
mOSW-C1
Optical
Switch
mVOA-C1
Variable
Attenuator
mSRC-C23000SA
mUTL-C1
LR4/LR8
Demux
RX
(DUT)
Eye-Mask
Measurement
Figure 3 - Four amplifiers (one per carrier) are used to enable overload testing
mSRC-C23000SA
mSRC-C23000SA
mSRC-C23000SA
mUTL-C1
LR4/LR8
Demux
TX
(Reference)
Eye-Mask
Measurement
Figure 1 - Example gain vs input power for the mSRC-C23000SA
7.1
7.15
7.2
7.25
7.3
7.35
7.4
7.45
-2
0
2
4
6
8
10
12
14
-25 -20 -15 -10 -5 0 5
Noise Figure [dB]
Output Power [dBm]
a
mSRC-C23000SA - Noise Figure and Output Power Vs. Input Power - 100% Current Level
Output Power [dBm]
Noise Figure [dB]
mSRC-C23000SA - Noise Figure and Output Power Vs. Input Power -
100% Current Level