AVIM and Mini-AVIM as first qualified connectors for
space application under ESCC standards
ICSO 2014, Tenerife, Spain
S. Hernandez, ESTEC; F. Taugwalder, Diamond SA
Scope
The ESA ECI funded project aims at
1. Define ESCC standards for optical connector family including
a.
b.
c.
d.
Review Basic specification 2263010
Review Generic specification Draft 31
Write Detail specification for AVIM Draft 32
Write Detail specification for Mini-AVIM Draft 33
2. Qualify the AVIM and Mini-AVIM as a test case
3. Final meeting at ESTEC
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ESCC Structure Document
Basic specification
ESCC 2263010
Generic specification
TBD
Evaluate the limits and
set qualification values
ESCC Standards, evaluation and
qualification of optical fiber connectors
for space application, ICSO 2012,
Ajaccio
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Perform qualification
based on set values
Detail specification
TBD
Defines specification on
particular product
TODAY
AVIM and Mini-AVIM as first qualified
connectors for space application under
ESCC standards, ICSO 2014, Tenerife
4
AVIM connector
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•
•
•
Longest heritage connector
Nickel-Silver components
High performance ZrO2Titanium ferrule
Up to 3.5mm cable or larger
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Mini-AVIM connector
•
•
•
•
•
•
Based on AVIM and DMI
Titanium components
High performance ZrO2Titanium ferrule
Up to 1.2mm cable
The lightest connector
High shock and vibration
resitant
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Qualified assemblies
• Patchcords
• Fujikura SM15 P-8/125-UV/UV-400 Panda 1550nm fiber
(distributed by Corning outside Japan)
• PEEK 1mm loose tube
• AVIM or Mini-AVIM
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Qualification flow
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Tests Results (1/2)
Qualification
DIL value using
PM1550nm
3N, 25 cycles, 180°
≤ 0.4dB
IEC 61300-2-5
11N, 25 cycles, 180°
Static side load
0.2N, 90°, 60min
≤ 0.4dB
IEC 61300-2-42
3N, 90°, 60min
Fiber Retention
5N, 2min
≤ 0.4dB
IEC 61300-2-4
20N, 2min
-55°C to +85°C, 1°C/min, 1h dwell,
100 cycles
≤ 0.4dB
IEC 61300-2-22
-55°C AVIM, Mini-AVIM, +85°C
353ND, +125°C Sample B, 500 cycles
1000h, +85°C
≤ 0.4dB
IEC 61300-2-18
5000h, +85°C for 353ND, +125°C
Sample B
.+25°C to +55°C, 95% r.h., 6
cycles, 144h
≤ 0.4dB
IEC 61300-2-46
.+25°C to +55°C, 95% r.h., 6 cycles,
144h
Cable related Characteristics
Torsion
Standards
Evaluation
Environment Characteristics
Operation Temperature
Temperature Storage/Dry heat
Damp Heat cycling
•
•
AVIM: 60 connectors, 3x10 Mating adapters
Mini-AVIM: 35 connectors, 18 Mating adapters
Note:
In evaluation, step stress , -190°C up to +110°C for 353ND,
+180°C for Sample B
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Tests Results (2/2)
Mechanical Performances
Mating durability
Shock
Vibration
Qualification
DIL value using
PM1550nm
100
≤ 0.4dB
IEC 61300-2-2
200 (AVIM), 500(Mini-AVIM)
500g, 2ms
≤ 0.4dB
IEC 60068-2-27
axial 2500g, radial 2200g (AVIM),
3000g Mini-AVIM
35gRMS, 20Hz-2kHz, 7.5min/axis
≤ 0.4dB
IEC 60068-2-64
75gRMS AVIM, 90gRMS Mini-AVIM
Standards
Evaluation
Optical Characteristics
Insertion Loss, IL
0.35dB typical, 0.7dB max
Return Loss, RL
APC >75dB
Extinction Ratio, ER
•
•
ER>23dB, ER typical 25dB
IEC 61300-3-6 met B.
IEC 61300-3-4 met OLCR
Diamond simil. IEC 61300-3-40
0.35dB typical, 0.7dB max
APC >75dB
ER>23dB, ER typical 25dB
AVIM: 60 connectors, 3x10 Mating adapters
Mini-AVIM: 35 connectors, 18 Mating adapters
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Scope
1.
Define ESCC standards for optical connector family including

b. Review Generic specification Draft 31 
a.
Review Basic specification 2263010
c.
Write Detail specification for AVIM Draft 32 
d.
Write Detail specification for Mini-AVIM Draft 33 
2. Qualify the AVIM and Mini-AVIM as a test case 
3. Final meeting at ESTEC 
Work performed by Diamond SA in Swizterland
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Procurement
Clarify procurement: Qualified or not?
1. ESCC Qualified configuration  OK See detailed spec for ordering
2. Non ESCC Qualified:
a.
Customer
b.
Divergence from ESCC qualified configuration 
i.
Components (fiber, cable, connector modification,..)
ii.
Environment (temperature, vibration, radiation,..)
iii. Process restriction
Custom product, Diamond will offer termination without guarantee on the
complete customer specification, but can provide consulting.
Mission
requirements and
specifications
Comparison
w/ qualification
data
yes
List deviation drom
qualification (components,
environment, packaging,..)
Discuss compliance matrix,
accept non compliance,
modify mission specs,..
no
Control production
spec and compliance
matrix
OK
Send PO
based on
supplier
offer
Supplier
No
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1. Analyze customer
information
2. Prepare Production
specification, compliance
matrix, offer
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Lesson Learned
•
Epoxy process and types
• Evaluated 353ND and another one named Sample B,
this last one by error
• Qualified 353ND
• Performance of Sample B can be probably brought to
125°C, it will require extra qualification
• Introduced 100% epoxy sample for Space Grade
process.
• Sample B at ESTEC for outgassing measurements
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Future evolution
•
Fiber
• New fibers are used every day and specification to
qualify fibers is required.
•
•
Cable
• PEEK tubing is partially acceptable, more flexible
cables are desired by end-users
Mini-AVIM cable
• Incompatibility of current Mini-AVIM is a limitation that
triggered the development of a Cabe version of the
Mini-AVIM
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