Bi-directional Single Channel
Integrated Tap Monitors
BTMS Series
Product Description
Oplink’s Single Channel Bi-directional Integrated Tap Monitor (BTMS) is a hybrid component
that integrates a flat spectral response of a thin-film tap with a high sensitivity PIN photodiode
for power monitoring applications. The Bi-directional feature allows power monitoring from
both input and output ports. BTMS minimizes component assembly costs and module foot-
print while increasing module design efficiency by facilitating fiber management.
The BTMS integrates the functionality of an optical coupler and a photodiode while delivering
low insertion loss and low dark current with high temperature stability over a wide wavelength
range. It is compact and easy to mount on a PCB board for module and network system use.
Applications include DWDM channel power monitoring, optical network switching/protection
monitoring, re-configurable optical add/drop multiplexers systems.
Oplink can provide customized designs to meet specialized feature applications. Also, Oplink
offers modular assemblies that integrate other components to form a full function module or
subsystem.
Functional Diagram
Input
Output
PD
Performance Specification
ns
Parameters
Specification
Unit
Features
1260~1360
2%
5%
10%
1510~1610
mm
dB
dB
dB
14~25
35~65
70~120
≤ 0.1
≤ 0.5
≤ 10
≥ 0.5
≤ 20
≤5
2%
5%
10%
≤ 21
≤ 16
≤ 12
0 to +70
-40 to +85
SMF-28
mA/W
dB
dB
nA
GHz
V
mA
dBm
°C
°C
Applications
Operating Wavelength Range
Insertion Loss (@ λ
Op
, T
Op
, All SOP, exclude
connector)
Polarization Dependent Loss
Return loss (exclude connector)
Responsivity (relative to nominal power at
input port)
Responsivity Polarization Dependence
Uniformity
[1]
2-/3-pin Package Easily Mounted
on a PCB
Flat and Broad Operating
Wavelength Range
Low Insertion Loss and PDL
Low Dark Current
Various Tap Ratios Available
High Temperature Stability with
Hermetically Sealed Photodiode
Monitor Optical Signal from One
Both Input and Output
Through
≤ 0.4
≤ 0.6
≤ 0.9
≤ 0.1
≥ 45
Tapped
Monitoring
2%
5%
10%
10~23
26~59
52~110
PD Dark Current (@ 70°C, -5V bias)
PD
Bandwidth (50 ohm, 5V, -3dB)
Reverse Voltage
Forward Current
Input Optical Power
Conditions
EDFAs and Raman amplifiers
Add/Drop and optical protection
monitoring
DWDM/CWDM systems
Operating Temperature Range
(<85%RH, Non-condensing)
Storage Temperature Range
(<85%RH, Non-condensing)
Fiber Type
Notes: 1) Excluding connectors.
R03.20080714
OPLINK [ OPLINK COMMUNICATIONS INC. ]
