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7500001

P1-P3P4-P6P7-P8
Finisar Corporation November 2015 Rev. C1 Page 1
Product Specification
CW Tunable Laser – Butterfly Package
S7500
PRODUCT FEATURES
• Full C-band tuning (89 channels at
50 GHz spacing)
• High, flexibly adjustable output
power, from 9 to 13 dBm
• Low power dissipation, typically
< 2.2 W at 75°C
• High side-mode suppression ratio
> 40 dB
• Dark tuning by reverse biasing the
integrated optical amplifier
• Compact, low-profile, hermetic
laser package with internal optical
isolator
• Integral wavelength locker, allowing
stabilization to within ±2.5 GHz
over life, compatible with 50 GHz
ITU grid spacing
• Polarization maintaining fiber
pigtail
APPLICATIONS
• DWDM transmission systems
• Tunable DWDM transponders and
transceivers
• Dynamic provisioning and
wavelength routing in metro
DWDM systems
• Optical packet or burst-mode
switching
• Test and measurement
Finisar’s S7500 tunable laser incorporates a monolithic InP chip that integrates a tunable
MG-Y laser with a semiconductor optical amplifier (SOA). The MG-Y (Modulated
Grating Y-branch) laser is an electronically tuned device that can address any wavelength
in the C-band. Since no mechanical or thermal adjustments are necessary, channel
switching is very fast. The SOA facilitates flexible control of the output power and acts
as a shutter when reverse biased, enabling dark tuning between channels.
The devices are packaged into a compact, low-profile hermetically sealed package, with
an internal optical isolator and a wavelength locker. The locker monitors both output
power and frequency of the light emitted from the chip, enabling a closed loop control
that guarantees stability of the frequency and output power over life, to within the
requirements of 50 GHz ITU grid spacing applications. The S7500 is provided with
polarization maintaining fiber for use with an external modulator. The laser is compliant
per RoHS Directive 2011/65/EU
1
.
S7500 Product Specification
Finisar Corporation November 2015 Rev. C1 Page 2
PRODUCT SELECTION
Product code
Description
7500001
Tunable laser, butterfly package, 89 channels at 50 GHz spacing from
191.70 THz to 196.10 THz, 13 dBm output power, 400
µm polarization
maintaining fiber pigtail with ST test plug
I. Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other
conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute
maximum ratings for extended periods can adversely affect device reliability.
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Storage temperature
T
S
-40
85
°C
Relative humidity
RH
0
85
%
1
Laser diode reverse voltage (all sections)
3
V
Laser gain current
I
g
160
mA
Reflector currents
I
rl
, I
rr
50
mA
Phase current
I
pc
10
mA
SOA current
I
SOA
240
mA
Photodiode bias voltage
V
PD,ref
, V
PD,λ
-5
0
V
Photodiode reverse current
I
PD,ref
, I
PD,λ
2
mA
TEC current
I
TEC
1.2
A
TEC voltage
V
TEC
3.5
V
Notes:
1. Non-condensing.
II. Electrical & Thermal Characteristics
Parameter
Min
Typ
Max
Unit
Ref.
Operating case temperature
-5
75
°C
Laser chip temperature
25
30
°C
Laser gain current
98
100
mA
Reflector currents (left, right)
33
mA
Phase current
7.5
mA
SOA current
90
167
mA
Photodiode bias voltage
-3
0
V
Thermistor resistance
10
kΩ
1
Thermistor sensitivity index
3930
K
1
TEC current
<0.75
0.85
A
2
TEC voltage
<2.5
2.8
V
2
Total power dissipation
<2.2
2.8
W
2
Notes:
1. With the laser chip temperature set to 25°C.
2. In steady state, with the laser chip temperature set to 25°C, and a case temperature of 75°C.
S7500 Product Specification
Finisar Corporation November 2015 Rev. C1 Page 3
III. Optical Characteristics (T
OP
= -5 to75°C)
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Output power
P
max
13
dBm
1
Output power variation over life
ΔP
-0.5
0.5
dB
2
Output power adjustment range
4
dB
3
Output power when disabled
-35
dBm
4
Lowest emission frequency
ν
min
191.15
191.70
THz
Highest emission frequency
ν
max
196.10
196.25
THz
Lowest emission wavelength
λ
min
1527.6
1528.8
nm
Highest emission wavelength
λ
max
1563.9
1568.4
nm
Channel spacing (ITU grid)
50
GHz
Number of channels
89
5
Frequency accuracy
Δν
-2.5
2.5
GHz
6
Side-mode suppression ratio
SMSR
40
dB
Optical signal-to-noise ratio
OSNR
50
55
dB
7
Linewidth
LW
5
MHz
8
Relative intensity noise
RIN
-140
dB/Hz
9
Back reflection tolerance
-14
dB
Optical isolation
40
dB
Polarization extinction ratio
PER
20
dB
Notes:
1. For all channels, BOL
2. With closed loop control on SOA current to maintain a fixed reference PD current.
3. Range over which the output power can be adjusted by changing the SOA current, down from the
output power P
max
, while maintaining all other optical specifications.
4. Output power with reverse biased SOA; used in order to block the laser output, e.g. while tuning
to another channel.
5. Consecutive channels at 50 GHz spacing within the [ν
min
… ν
max
] range. Default start frequency is
191.70 THz (start wavelength 1563.9 nm). Custom tuning ranges are available upon request.
Contact Finisar Sales for details.
6. With closed loop control on the left reflector, right reflector, and phase current, in order to
maintain a fixed ratio of the etalon and reference PD currents. See Finisar application note AN-
2095 for details.
7. In a 0.1 nm wide band.
8. Intrinsic Lorentzian linewidth, measured e.g. using a phase noise spectral density measurement,
disregarding low frequency phase noise originating from the drive circuitry.
9. Average value over the frequency range from 0.1 GHz to 10.0 GHz.
P1-P3P4-P6P7-P8

7500001

Mfr. #:
Buy 7500001
Manufacturer:
Finisar Corporation
Description:
Fiber Optic Development Tools C-band tunable laser butterfly package, 89 channels at 50 GHz spacing from 191.70 THz to 196.10 THz, 13 dBm output power, 400 m polarization maintaining fiber pigtail wit
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