Attenuators
MEMS Attenuator/On-Off Switch
DiCon’s Attenuator/On-Off Switch is based on a micro-electromechanical
system (MEMS) chip. The MEMS chip consists of an electrically
movable mirror on a silicon support. A voltage applied to the MEMS
chip causes the mirror to rotate, which changes the coupling of
light between the input and output fibers of the Attenuator/On-Off
Switch.
Cylindrical Package
Features
•
•
•
•
•
Combining Variable Optical Attenuator and On-Off Switch
Small attenuator package
Qualified to GR-1221
Available in opaque or transparent versions
Available in both cylindrical and 14-pin DIP package
Applications
Attenuator/On-Off
Switches
are used as safety shutters during laser
transmitter power up as well as for channel equalization once the laser has
stabilized. In its highest loss position, the Attenuator/On-Off
Switch
provides
greater than 45 dB of power isolation. Used as an Attenuator, it allows the
output power of the laser to be continuously adjusted over a 40 dB range.
Attenuator/On-Off
Switches
are ideally suited for use within line cards or
transponders.
U.S. patent pending. Specifications subject to change. Copyright ©2004 DiCon Fiberoptics, Inc. All rights reserved.
Attenuators
Specifications
1,2
Excess loss
Off state isolation
Broad band
Application
Narrow band
Application
3
0 to 15 dB
Polarization
dependent loss 15 to 20 dB
Attenuation slope
Polarization mode dispersion
Back-reflection
Optical power
Response time
Repeatability
Wear-out
Fiber type
Operating temperature
Storage temperature
0.8 dB max.
45 dB min.
0 to 15 dB
15 to 20 dB
0 to 20 dB
0.15 dB max.
0.2 dB max.
20 dB/V max.
0.05 ps max.
-50 dB max.
500 mW max.
2 ms max.
0.1 dB max.
1 x 10 cycles min.
9/125 single mode fiber
-5
0
C to +70
0
C
-40
0
C to +85
0
C
9
Ordering Information
MSA -
0.4 dB max.
0.7 dB max.
0.2 dB max.
-
-
-
-
-
9
-
-
-
Housing Type
C
D
T
O
13
15
16
20
X
S
F
2B
9L
FC
FC/APC
X
N
1
X
Cylindrical
14-Pin DIP
Transparent
1
Opaque
2
1280 - 1330 nm
1528 - 1563 nm
1570 - 1610 nm
20 dB min.
Specify X dB min. (X <= 40)
Slow ripple (broad band)
Fast ripple (narrow band)
250
µ
barefiber
900
µ
loosetube
FC/SPC
FC/APC
specify connector type
3
None
1 meter
Specify X meters
Flatness
Attenuator Type
Operating Wavelength Range
Attenuator Range
Ripple Type
Jacket Type
Connector Type
1. All specifications referenced without connectors.
2. At room temperature.
3. Maximum change of each 2 nm segment within the operating range.
Pigtail Length
Electrical Specifications
Actuation type
DC drive voltage
Voltage damage threshold
Resistance
Power consumption
Non-latching
0 - 6.5 VDC
10 VDC max.
2 MΩ min.
20 uWatt max.
1. Minimum insertion loss at 0 V.
2. Minimum insertion loss at 6.5 V (high isolation at 0 V).
3. Connector Types: FC/UPC, SC, SC/APC, SC/UPC, LC, LC/UPC, MU/UPC
Housing Dimensions
Cylindrical Package
3.00
27.5
13.5
1.0
MEMS-VOA
Ø2.5
Ø5.56
Optical Performance
Transparent
0
Attenuation (dB)
Attenuation (dB)
10
20
30
40
50
0
1
2
3
4
5
Control Voltage (V)
6
7
0
10
Ø5.56
2 (CNTL)
3 (GND)
Opaque
14-pin DIP Package
ø
5.50
9.50
20.83
12.70
7.50
20
30
4.07
4.84
2.54
7.62
Units: mm
ø.
45
Pin Assignment
1 GND 8 NC
2 CNTL 9 NC
3 NC 10 NC
4 NC 11 CASE GND
5 NC 12 NC
6 NC 13 NC
7 NC 14 NC
40
14 13 12 11 10 9 8
50
Top View
0
1
2
3
4
5
Control Voltage (V)
6
7
1
2
3
4
5
6
7
DiCon Fiberoptics, Inc. 1689 Regatta Blvd. Richmond, CA 94804
Tel. (510)620-5000
Fax. (510)620-4100
www.diconfiber.com
0055E
Attenuators
MEMS Attenuator/On-Off Switch
