Single Window Fixed In-line
Attenuators
(1310, S, C, L, and C+L band)
SWFA Series
Features
Wavelength Independent
Low Insertion Loss and PDL
High Power Handling
Guaranteed Reliability
Single Window Fixed In-line Attenuators
(1310, S, C, L, and C+L band)
The Oplink fused single window wideband Fixed In-line Attenuators provide accurate
attenuation over wide bandwidth with high performance and high reliability. These
attenuators have excellent temperature stability, very good wavelength flatness, very
low polarization sensitivity and are available with various attenuation ratios, wave-
length ranges, and connector options. All devices are shown to be able to handle
high optical power up to 4W and are tested according to industry standard proce-
dures. Reliability is guaranteed through stringent tests to fully meet Telcordia
GR-1221 requirements.
Oplink can provide customized designs to meet specialized feature applications.
Also,Oplink offers modular assemblies that integrate other components to form a full
functionmodule or subsystem.
Applications
Flatness Adjustment
Power Management
Testing Instruments
Laboratory R&D
L
Input
Output
Ø
Performance Specifications
Parameter
Operating Wavelength Range
Fiber Type
Insertion Loss
1
Return Loss
Temperature Dependent Loss
2
Optical Power Handling
Operating Temperature Range
3
Storage Temperature Range
Package Dimension
4
Qualifications
nm
min
min
max
C band
L band
C+L band
1530~1565 1570~1605
1530~1610
Corning SMF-28
See Insertion Loss Table I, II, III
50 dB
< 0.15 dB
4W
-40 to 75 °C
-40 to 58 °C
P1: 250µm SMF-28 bare fiber
(Ø)3.0 x (L)47 mm
(Ø)3.0 x (L)60 mm
P2: 900µm loose tube
(L)96 x(W)12 x (H)6.4mm
P3: 3mm cable
Telcordia GR-1221
1310nm
1270~1350
S band
1420~1500
1. Values are referenced without connector loss.
2. Temperature Sensitivity Coefficient ~0.002dB/°C at the range of -5 to 75°C
3. Operating temperature range changes to -5 to 75°C in P2, P3 package and all package with connectors
4. The mechanical tolerance should be +/- 0.2 mm on all package dimensions unless otherwise custom specified.
Oplink Communications, Inc.
R1.20070731
Single Window Fixed In-line Attenuators
(1310, S, C, L, and C+L band)
SWFA Series
Insertion Loss Tables
Insertion Loss (IL) I : C or L band coupler
Attenuation
Atte
20dB
18dB
17dB
15dB
13dB
11dB
10dB
9dB
8dB
7dB
6dB
5dB
4dB
3dB
2dB
1dB
IL
1
(dB)
19.0-21.0
17.50-19.0
15.5-17.5
13.5-15.5
11.5-13.5
10.5-11.5
9.50-10.50
8.50-9.50
7.50-8.50
6.50-7.50
5.50-6.50
4.60-5.50
3.70-4.30
2.70-3.30
1.70-2.30
0.85-1.15
WDL
2
(dB)
≤0.45
≤0.45
≤0.40
≤0.30
≤0.25
≤0.25
≤0.25
≤0.25
≤0.25
≤0.20
≤0.20
≤0.20
≤0.20
≤0.20
≤0.15
≤0.15
PDL
3
(dB)
≤0.12
≤0.15
≤0.15
≤0.15
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
1. Insertion loss over operating wavelength range at ~23°C (excluding PDL and TDL).
2. Insertion loss change over the specified wavelength range.
3. Insertion loss change over the all input polarization states.
Insertion Loss (IL) II : 1310nm, S
Atte
Attenuation
20dB
18dB
17dB
15dB
13dB
11dB
10dB
9dB
8dB
7dB
6dB
5dB
4dB
3dB
2dB
1dB
IL
1
(dB)
18.5-21.5
17.5-18.8
16.0-17.5
13.8-16.0
12.0-13.8
10.5-12.0
9.90-10.5
8.70-9.90
7.60-8.70
6.50-7.60
5.40-6.50
4.40-5.40
3.40-4.40
2.60-3.40
1.70-2.30
0.80-1.20
2
or C+L band coupler
PDL
3
(dB)
≤0.20
≤0.15
≤0.15
≤0.15
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
≤0.10
WDL
2
(dB)
≤0.90
≤0.80
≤0.70
≤0.60
≤0.50
≤0.50
≤0.50
≤0.50
≤0.50
≤0.45
≤0.45
≤0.40
≤0.35
≤0.35
≤0.25
≤0.20
1. Insertion loss over operating wavelength range at ~23°C (excluding PDL and TDL). For S-band product, add 0.1dB
due to water absorption peak of fiber.
2. Insertion loss change over the specified wavelength range. For S-band product, add 0.1dB in WDL due to water
absorption peak of fiber.
3. Insertion loss change over the all input polarization states.
Oplink Communications, Inc.
R1.20070731
Single Window Fixed In-line Attenuators
(1310, S, C, L, and C+L band)
SWFA Series
Ordering Information
Oplink can provide a remarkable range of customized optical solutions. For detail, please contact Oplink's OEM design team
or account manager for your requirements and ordering information (510) 933-7200.
SWFA
1
P
0
0
Wavelength
1310nm= 3
C band= 5
S band= 4
L band= 6
C+L band= 1
TapRatio
20dB= 20
18dB= 18
17dB= 17
15dB= 15
13dB= 13
11dB= 11
10dB= 10
9dB= 09
8dB= 08
7dB= 07
6dB= 06
5dB= 05
4dB= 04
3dB= 03
2dB= 02
1dB= 01
Package & Fiber Type
P1+ 250µm bare fiber= 11
P2+ 900µm loose tube= 22
P3+ 3mm cable= 33
Fiber Length
1.0
1.5
2.0
0.5
meter= 1
meter= 5
meter= 2
meter= H
Connector Type
None= 1
FC/PC= 2
FC/SPC= 3
FC/APC= 4
SC/PC= 5
SC/SPC= 6
SC/APC= 7
ST= 8
LC= 9
MU= A
46335 Landing Parkway Fremont, CA 94538-6407 Tel: (510 933-7200 Fax: (510) 933-7300 Email: Sales@Oplink.com
R1.20070731
Product Lines
Mux/Demux
Switching/Routing
Coupling/Splitting
Monitoring/Conditioning
Amplification
Interconnect
RGB Laser Modules
Embedded System
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