SPECIFICATIONS Low DOP ASE Broadband Source

DENSELIGHT SEMICONDUCTORS PTE. LTD.
6 Changi North St. 2, S498831 SINGAPORE
Tel: (65) 64154488
Fax: (65) 64157988
www.denselight.com
SPECIFICATIONS
Low DOP ASE Broadband Source
DL-ASE-CW-CSL165A
Rev A
February 2007
DL-ASE-CW-CSL165A
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A. PRODUCT DESCRIPTION
The DenseLight DL-ASE-CW-CSXXXXA is a series Low DOP ASE broadband source for fiber
optic gyroscope, fiber optic sensor, optical test instrument and optical coherence
tomography. This DL-ASE-CW-CSXXXXA consists of a DenseLight standard ASE broadband
source, a temperature controller and a built-in current driver capable for CW driving,
which can be customized with various options to meet your specific needs. The
broadband source covers over a wide wavelength range include O, E, S, C and L bands.
B. FEATURES
•
Ex-fiber output power of >16dBm
•
Spectral power density >-6dBm/nm over 1570 to 1610nm
•
•
•
•
•
•
•
•
•
•
•
Low Degree of Polarization
Single mode fiber output
Integrated optical isolator
Highly stable power output with active power control
Built-in current driver and temperature controller
Over temperature protection and internal PCB temperature monitor
Single +5V power supply (optional power adapter)
High wall-plug efficiency
Compact size
RoHS Compliance
Telcordia Qualified broadband source (GR-468-CORE)
C. APPLICATIONS
•
•
•
•
•
•
Optical Test Instrument
Fiber Optic Sensors
Fiber Optic Communications
Optical Coherence Tomography
Biomedical Imaging Device
Clinical Healing Equipment
Rev A
February 2007
DL-ASE-CW-CSL165A
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D. PHYSICAL DIMENSIONS AND MECHANICAL SPECIFICATION
Dimension:
Enclosure:
Optical output:
Cooling:
Electronic interface:
Rev A
February 2007
L100 x W80 x H20 mm
Metal Case
1 m SMF-28 fiber, 900um loose tube with FC/APC
Air-cooled or fan cooled. (Mounting holes for fan are provided)
10-way single row HE14 shrouded header
DL-ASE-CW-CSL165A
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E. PIN ASSIGMENT AND FUNCTION
1
2
3
4
5
6
7
8
9
10
HE14 Shrouded Header Pin Layout (Pin 1 near to SMF output)
Pin Assignment
Pin No.
Symbol
Power/Control
/Monitor
1
PGND
P
Power Supply Ground
2
PGND
P
Power Supply Ground
3
VS
P
+5V d.c.
4
VS
P
+5V d.c.
5
OVRT
M
D
O
To report PCB over temperature and
internal self-protection shutdown in
operation (Active high)
6
TMON
M
A
O
To monitor the temperature of PCB
7
PMON1
M
A
O
To monitor the PD current in ASE1
8
PMON2
M
A
O
To monitor the PD current in ASE2
9
LO_EN
C
D
I
10
AGND
Rev A
February 2007
Analog
/Digital
Input
/Output
Description
To enable Light output (active low or
no connection to enable light driver)
Signal ground for control and monitor
signals
DL-ASE-CW-CSL165A
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F. ABSOLUTE MAXIMUM RATINGS
Parameter
Operating temperature
Symbol
Condition
Top
Iop
Operating Relative Humidity 2
RH
Iop
Storage temperature
Tstg
Unbiased
Input current
Is
1)
2)
(Chassis) 1
Min
Max
0
60
°C
85
%
85
°C
6
A
Unit
-40
Unit
<0°C or >60°C extended range available
Non condensing
G. ELECTRICAL SPECIFICATIONS 3
Parameter
Symbol
Condition
Min
Typ
Max
4.75
5
5.5
V
Input Power Supply
VS
Input Current
IS
1.9
A
Total Power
Consumption
PS
9
W
Over Temperature
Internal PCB
Temperature Monitor
OVRT
VOL
Normal
VOH
Over-temp
TMON
VOUT
Output Impedance
ROUT
Power Output Monitor
|IOUT|
PMON1
PMON2
Voltage
VOUT
Output Impedance
ROUT
Source Current
Light Output Enable
3)
0
2.0
0.45
V
3.0
V
o
Voltage
Source Current
Open-drain digital output with internal 1K pull-up to 3V for
VH and 8mA current sink for VL
Analog voltage: TMON = 395mV + (6.2mV/ C x T),
T = PCB temperature in oC
RX = infinite
0
2.5
4
Analog output: PMONx ~ 1.5V x (Po / Prated ),
Po and Prated in mW
RX = infinite
0
3.0
|IOUT|
VOUT = 3.0V
LO-EN
Digital input with internal 10K pull-down for light
output enable at logic low or no connection
Normal
VIH
Disable light
output
4
0
2.5
mA
V
V
Ω
150
VIL
V
Ω
150
VOUT = 2.5V
mV
mA
1
Normal
3.3
Disable
light
output
Unless otherwise specified, tests are performed at Top = 25oC.
Rev A
February 2007
DL-ASE-CW-CSL165A
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H. OPTICAL SPECIFICATIONS
Parameter
Power output
Symbol
Po
Power density @ 1570 to 1610nm
Pdensity
-6
Bandwidth @ 3dB
BFWHM
45
Degree of polarization
DOP
Output stability (4) 1 hour
8 hour
Stb
4)
Min
16
Typ
Max
Unit
dBm
dBm/nm
nm
5
%
± 0.05
± 0.1
dB
dB
After 1 hour warm-up
Power Density (dBm/nm)
I. TYPICAL OPTICAL PERFORMANCE
2.5
0.0
-2.5
-5.0
-7.5
-10.0
1570
1580
1590
1600
1610
Wavelength (nm)
Spontaneous Emission Spectrum
Rev A
February 2007
DL-ASE-CW-CSL165A
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J. APPLICATION INFORMATION
J.1 Typical Application Circuit
RX
RX
+
-
-
VOUT
150Ω
PDMON2
+
PDMON1
VBUFFER OUTPUT
ASE Broadband Source
150Ω
ASE1 Module
LO-EN
Time
Delay
VS
VS
5V
DC
PGND
PGND
AGND
ASE1 Chip
& PD1
ASE
Control Circuity
TEC1 &
Thermistor1
10kΩ
Power
Circuitry
ASE2 Module
ASE2 Chip
& PD2
TEC
Control Circuitry
TEC2 &
Thermistor2
VOUT
TMON
150Ω
Optical
Output
+
VBUFFER OUTPUT
RX
J.2 Power Supply Requirement and Connections
The power supply must be capable of supplying the maximum input current (IS) as given
in the electrical specification table at all times during operation. This is because during
transients (eg. switching on the light source or with a sudden change in operating
ambient temperature), the ASE broadband Source will require a momentary higher
current from the power supply compared to its steady-state operation.
The two cables to the two Vs pins (Pin 3 and Pin 4) should be shorted at the positive
terminal of the power supply as shown in the Typical Application Circuit. This is to divide
the total current load to the broadband source between the two cables. Similarly, the
two cables to the PGND pins (Pin 1 and Pin 2), as well as the cable to the AGND pin (Pin 10)
should be shorted at the ground of the power supply terminal.
Rev A
February 2007
DL-ASE-CW-CSL165A
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J.3 Selection of Resistance RX for Analog Monitor Signals
In the Typical Application Circuit given, the function of RX is to increase the current in the
signal cables so as to reduce the effect of environmental noise on the analog monitor
signals. In a noisy environment, the value of RX is recommended to be 1kΩ. By choosing
RX to be 1kΩ, the actual voltage measured at the buffer output will be reduced due to
loading effect, as compared to when RX is infinite.
VBUFFER OUTPUT =
RX
× VOUT
R X + 150
where RX is resistance in Ω
In a non-noisy environment, the value of RX can be increased to reduce loading effect. It
is not recommended to choose RX less than 1kΩ.
For further technical information, please refer to DenseLight Semiconductor
Low DOP ASE Broadband Source User Operation Manual.
K. REVISION CONTROL
Authorized
Personnel
Rev
OTK
A
Rev A
February 2007
Description of Change
Initial: Production Release
Date
28 February 2007
DL-ASE-CW-CSL165A
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