Product Bulletin
10 mW 1550 nm CW DFB
Laser with PM Fiber for
WDM Applications
CQF935/208 Series
The JDS Uniphase CQF935/208 series laser is
specifically developed for wavelength division
multiplexing (WDM) systems, where it is used as a
wavelength selected source in combination with an
external modulator, such as the LiNbO
3
-based
Mach-Zehnder.
Selected wavelengths comply with ITU
recommendations, both in range (channels from
1527.61 to 1610.06 nm) and in channel definition,
thus adhering to the 100 GHz grid relative to a
frequency of 193.1 THz. Customization of the
wavelength spacing to a 50 GHz grid is possible.
Each laser's wavelength is accurately measured,
and the laser itself is accompanied by a datasheet
with the laser performance at the temperature T
λ
where the required wavelength channel is reached.
The CQF935/208 shows high side mode suppression
ratios, very low relative intensity noise, and small
linewidths. It is available in a standard 14-pin
butterfly package equipped with a polarization
maintaining fiber to facilitate coupling to the
modulator, and shows superb thermal stability.
Key Features
•
1550 nm WDM distributed feedback laser diode
•
>10 mW output power
•
Polarization maintaining fiber
•
Built-in thermoelectric cooler
•
Cooled built-in optical isolator
•
1527 - 1610 nm wavelength range
•
0.8 nm (100 GHz) spacing
•
0.4 nm (50 GHz) spacing optional
Applications
•
Long haul and metro DWDM architectures
CQF935/208 Series | 2
Specifications
Limiting Values
Parameter
Laser Diode
Radiant output power from pigtail
Reverse voltage
Forward current
Monitor Diode
Reverse voltage
Forward current
Module
Storage temperature range
Case operating temperature range
Fiber Pigtail
Bending radius
Tensile strength fiber to case
Symbol
P
peak
V
R
I
F
V
R
I
F
T
stg
T
op
R
F
Conditions
-
-
-
-
-
(note
1
)
Cooler active
-
(note
1
)
Min
-
-
-
-
-
-40
0
35
-
Min
10
-
0.1
-
1527
20
-
30
30
-
-
-
0.07
25
-
-
9.5
3800
-
Typ
-
-
-
25
-
-
-
45
35
-
<2
-
-
-
-
-
10
-
-
-
-
-
-
-
-
-
-
300
Max
15
2.0
200
20
10
85
65
-
5
Max
-
150
0.25
40
1610
35
2.0
-
-
-135
5
0.001
0.12
500
0.1
10
10.5
4100
1.2
2.5
11.5
128
420
1.0
-
-
-
-
Unit
mW
V
mA
V
mA
°C
°C
mm
N
Unit
mW
mA
W/A
mA
nm
°C
V
dB
dB
dB/Hz
MHz
nm/°C
nm/°C
µA/mW
µA
%
kΩ
K
A
V
µm
µm
µm
mm
m
dB
m
years
Characteristics
(T
chip
= T
λ
, T
amb
at 25 °C, P
O
= 10 mW unless otherwise specified)
Parameter
Symbol Conditions
Radiant output power from pigtail
Operating current
Differential efficiency
Laser Diode
Threshold current
Central wavelength (ITU grid)
Laser set temperature for
λ
c
Forward voltage
Side mode suppression ratio
Optical isolation
Relative intensity noise
Spectral linewidth
Wavelength drift with case temp.
Wavelength temperature tunability
Monitor Diode
(V
R
= 10 V)
Monitor diode responsivity
Dark current
Temperature tracking error
Thermistor
Resistance
Thermistor constant
Thermoelectric Cooler
(∆T
= 45
°C)
Cooler current
P
O
I
op
η
I
th
λ
c
T
λ
V
F
SMSR
ISO
RIN
∆λ
-
-
R
I
md
TE
R
th
B
I
cool
20
°C
< T
λ
< 35
°C
-
-
-
-
-
-
-
-
50 KHz - 2.5 GHz
FWHM
0°C < T
case
< 65°C
20°C < T
λ
< 35°C
-
-
0
°C
< T
case
< 65
°C
T
th
= 25 °C
-
-
Cooler voltage
V
cool
-
-
Polarization Maintaining Fiber Pigtail
(Fujikura SM.15-P-8/125-UV/UV 400 PANDA or equivalent)
Mode field diameter
Ø
mf
-
9.5
Cladding diameter
Diameter of secondary coating
Diameter of loose tube
Length of loose tube
Polarization extinction ratio
Length of pigtail
Reliability
Long term wavelength drift (note
1
)
ML = Median Life, EOL = End Of Life.
Ø
cl
Ø
sc
Ø
LT
l
LT
ER
-
ML
λ
-
-
-
-
E-field along slow axis
-
EOL:
∆λ
= 0.2 nm
122
380
0.8
0.9
18
1
-
1. Mechanical integrity/environmental endurance tested according to Telcordia GR-468-CORE and MIL-STD-883.
CQF935/208 Series | 3
Typical Performance Characteristics
15
12.5
T = T
l
0
-10
T = T
l
Wavelength (nm): 1588.73
at R
ntc
= 10.60 kOhm (T ~ 23.4
o
C)
I
op
= 76 mA
Light Output (mW)
10
7.5
5
2.5
0
0
25
50
75
100
125
Intensity (dB)
-20
-30
-40
-50
-60
-70
1579
1584
1589
1594
1599
Current (mA)
Wavelength (nm)
Typical L-I curve for the CQF935. Each laser is characterized
at the temperature for which the specified wavelength
channel
l
c
is reached.
The use of multi-quantum well technology results in excellent
side-mode suppression ratios and small linewidths. The inset
shows how the wavelength is specified on each datasheet.
Dimensions Diagram
(Specifications in mm [inches] unless otherwise noted; tolerance = ±0.15 [±0.006]; coverpipe may change.)
Pinout
1 Thermistor
2 Thermistor
3 LD cathode DC input via
inductance
4 PD anode
5 PD cathode
6 Cooler anode
7 Cooler cathode
8 Case GND
9 Case GND
10 Not connected
11 LD anode, case
12 LD cathode, AC input
13 LD anode, case
14 Not connected
Fiber Termination:
Default 1.25 mm or 2.5 mm ferrule
CQF935/208 Series | 4
Ordering Information
For more information on this or other products and their availability, please contact your local JDS Uniphase account manager
or JDS Uniphase directly at 1-800-498-JDSU (5378) in North America and +800-5378-JDSU worldwide or via e-mail at
sales@jdsu.com.
Sample: CQF935/208-19270 for wavelength 1555.75 nm.
Attention:
Order confirmations on this part number are preceeded by FG’ (e.g., FG’CQF935/208-19270).
CQF935/208-
Channel
Code
19625
19620
19615
19610
19605
19600
19595
19590
19585
19580
19575
19570
19565
19560
19555
19550
19545
19540
19535
19530
19525
19520
19515
19510
19505
19500
19495
19490
19485
19480
19475
19470
19465
19460
19455
19450
Optical
Frequency
f
c
(THz)
196.25
196.20
196.15
196.10
196.05
196.00
195.95
195.90
195.85
195.80
195.75
195.70
195.65
195.60
195.55
195.50
195.45
195.40
195.35
195.30
195.25
195.20
195.15
195.10
195.05
195.00
194.95
194.90
194.85
194.80
194.75
194.70
194.65
194.60
194.55
194.50
Wavelength
(Vacuum)
λ
c
(nm)
1527.61
1527.99
1528.38
1528.77
1529.16
1529.55
1529.94
1530.33
1530.73
1531.12
1531.51
1531.90
1532.29
1532.68
1533.07
1533.47
1533.86
1534.25
1534.64
1535.04
1535.43
1535.82
1536.22
1536.61
1537.00
1537.40
1537.79
1538.19
1538.58
1538.98
1539.37
1539.77
1540.16
1540.56
1540.95
1541.35
Channel
Code
19445
19440
19435
19430
19425
19420
19415
19410
19405
19400
19395
19390
19385
19380
19375
19370
19365
19360
19355
19350
19345
19340
19335
19330
19325
19320
19315
19310
19305
19300
19295
19290
19285
19280
19275
19270
Optical
Frequency
f
c
(THz)
194.45
194.40
194.35
194.30
194.25
194.20
194.15
194.10
194.05
194.00
193.95
193.90
193.85
193.80
193.75
193.70
193.65
193.60
193.55
193.50
193.45
193.40
193.35
193.30
193.25
193.20
193.15
193.10
193.05
193.00
192.95
192.90
192.85
192.80
192.75
192.70
Wavelength
(Vacuum)
λ
c
(nm)
1541.75
1542.14
1542.54
1542.94
1543.33
1543.73
1544.13
1544.53
1544.92
1545.32
1545.72
1546.12
1546.52
1546.92
1547.32
1547.72
1548.12
1548.51
1548.92
1549.32
1549.72
1550.12
1550.52
1550.92
1551.32
1551.72
1552.12
1552.52
1552.93
1553.33
1553.73
1554.13
1554.54
1554.94
1555.34
1555.75
Channel
Code
19265
19260
19255
19250
19245
19240
19235
19230
19225
19220
19215
19210
19205
19200
19195
19190
19185
19180
19175
19170
19165
19160
19155
19150
19145
19140
19135
19130
19125
19120
19115
19110
19105
19100
19095
19090
Optical
Frequency
f
c
(THz)
192.65
192.60
192.55
192.50
192.45
192.40
192.35
192.30
192.25
192.20
192.15
192.10
192.05
192.00
191.95
191.90
191.85
191.80
191.75
191.70
191.65
191.60
191.55
191.50
191.45
191.40
191.35
191.30
191.25
191.20
191.05
191.10
191.05
191.00
190.95
190.90
Wavelength
(Vacuum)
λ
c
(nm)
1556.15
1556.56
1556.96
1557.36
1557.77
1558.17
1558.58
1558.98
1559.39
1559.79
1560.20
1560.61
1561.01
1561.42
1561.83
1562.23
1562.64
1563.05
1563.46
1563.86
1564.27
1564.68
1565.09
1565.50
1565.90
1566.31
1566.72
1567.13
1567.54
1567.95
1568.39
1568.77
1569.18
1569.59
1570.01
1570.42
CQF935/208 Series | 5
CQF935/208-
Channel
Code
19085
19080
19075
19070
19065
19060
19055
19050
19045
19040
19035
19030
19025
19020
19015
19010
19005
19000
18995
18990
18985
18980
18975
18970
18965
18960
18955
18950
18945
18940
18935
Optical
Frequency
f
c
(THz)
190.85
190.80
190.75
190.70
190.65
190.60
190.55
190.50
190.45
190.40
190.35
190.30
190.25
190.20
190.15
190.10
190.05
190.00
189.95
189.90
189.85
189.80
189.75
189.70
189.65
189.60
189.55
189.50
189.45
189.40
189.35
Wavelength
(Vacuum)
λ
c
(nm)
1570.83
1571.24
1571.65
1572.06
1572.48
1572.89
1573.30
1573.71
1574.13
1574.54
1574.95
1575.37
1575.78
1576.20
1576.61
1577.03
1577.44
1577.86
1578.27
1578.69
1579.10
1579.52
1579.93
1580.35
1580.77
1581.18
1581.60
1582.02
1582.44
1582.85
1583.27
Channel
Code
18930
18925
18920
18915
18910
18905
18900
18895
18890
18885
18880
18875
18870
18865
18860
18855
18850
18845
18840
18835
18830
18825
18820
18815
18810
18805
18800
18795
18790
18785
18780
Optical
Frequency
f
c
(THz)
189.30
189.25
189.20
189.15
189.10
189.05
189.00
188.95
188.90
188.85
188.80
188.75
188.70
188.65
188.60
188.55
188.50
188.45
188.40
188.35
188.30
188.25
188.20
188.15
188.10
188.05
188.00
187.95
187.90
187.85
187.80
Wavelength
(Vacuum)
λ
c
(nm)
1583.69
1584.11
1584.53
1584.95
1585.36
1585.78
1586.20
1586.62
1587.04
1587.46
1587.88
1588.30
1588.73
1589.15
1589.57
1589.99
1590.41
1590.83
1591.26
1591.68
1592.10
1592.52
1592.95
1593.37
1593.79
1594.22
1594.64
1595.07
1595.49
1595.91
1596.34
Channel
Code
18775
18770
18765
18760
18755
18750
18745
18740
18735
18730
18725
18720
18715
18710
18705
18700
18695
18690
18685
18680
18675
18670
18665
18660
18655
18650
18645
18640
18635
18630
18625
18620
Optical
Frequency
f
c
(THz)
187.75
187.70
187.65
187.60
187.55
187.50
187.45
187.40
187.35
187.30
187.25
187.20
187.15
187.10
187.05
187.00
186.95
186.90
186.85
186.80
186.75
186.70
186.65
186.60
186.55
186.50
186.45
186.40
186.35
186.30
186.25
186.20
Wavelength
(Vacuum)
λ
c
(nm)
1596.76
1597.19
1597.62
1598.04
1598.47
1598.89
1599.32
1599.75
1600.17
1600.60
1601.03
1601.46
1601.88
1602.31
1602.74
1603.17
1603.60
1604.03
1604.46
1604.88
1605.31
1605.74
1606.17
1606.61
1607.04
1607.47
1607.90
1608.33
1608.76
1609.19
1609.62
1610.06
PANDA is a trademark of Fujikura Ltd.
Telcordia is a trademark of Telcordia Technologies Incorporated.
North America toll-free: 1-800-498-JDSU (5378)
Worldwide toll-free: +800-5378-JDSU
www.jdsu.com
All statements, technical information and recommendations related to the products herein are based upon information
believed to be reliable or accurate. However, the accuracy or completeness thereof is not guaranteed, and no responsibility is
assumed for any inaccuracies. The user assumes all risks and liability whatsoever in connection with the use of a product or its
application. JDS Uniphase reserves the right to change at any time without notice the design, specifications, function, fit or
form of its products described herein, including withdrawal at any time of a product offered for sale herein. JDS Uniphase
makes no representations that the products herein are free from any intellectual property claims of others. Please contact JDS
Uniphase for more information. JDS Uniphase and the JDS Uniphase logo are trademarks of JDS Uniphase Corporation. Other
trademarks are the property of their respective holders. Copyright JDS Uniphase Corporation. All rights reserved
10127499 Rev.02 01/04
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