QLM9P48 Series
OptiLock™ 980 nm Fiber Bragg
Grating Stabilized Pump Lasers
I
Superb optical performance over time and temperature, and
I
I
I
I
I
regardless of stress, aging and changes in fiber grating
orientation: power, wavelength, tracking ratio, threshold
current and monitor photo-detector current remain stable
DWDM optical amplifier, telecom, CATV & datacom applications
973-986 nm center emission wavelength
Up to 200 mW kink-free power
Exceptional wavelength-locking capability
Proven reliability based on 60,000 devices, 600 million hours
Description
Pin Connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Cooler (+)
Thermistor
Monitor Anode (- bias)
Monitor Cathode (+ bias)
Thermistor
NC
NC
NC
NC
Laser Anode (+)
Laser Cathode (-)
NC
Case Ground
Cooler (-)
Pinout:
1
2
3
4
5
6
7
Monitor
Laser
Cooler
Thermistor
14
13
12
11
10
9
8
Corning Lasertron's new OptiLock
TM
family of 980 nm fiber Bragg grating stabilized
(“BGS”) pump lasers is available in production volumes with fiber-coupled optical
kink-free powers up to 200 mW at center wavelengths from 973 to 986 nm.
In addition to extraordinary wavelength-locking capabilities (zero probability of
wavelength unlocking), Corning Lasertron OptiLock
TM
BGS pump lasers also feature
superb power stability over an extended range of operating powers, temperatures and time.
Other key performance characteristics of these devices — such as tracking ratio, monitor
photo-detector current, and threshold current — remain consistently stable regardless of
stress, aging and changes in fiber grating orientation. Power in band, spectral width, and
side mode suppression ratio also remain stable under such conditions.
These BGS pump lasers are critical components in amplifiers for use in
dense-wavelength-division multiplexing (“DWDM”) fiber-optic transmission systems
requiring wide bandwidth, gain-flattened, stable performance. OptiLock
TM
pump lasers
maintain long-term performance of DWDM networks by eliminating wavelength unlocking
that occurs as a result of handling, aging, or inevitable change in fiber grating orientation
and stress.
The shift to higher channel counts requires amplifiers using high-power pumps with
extremely stable dynamic performance. These new BGS pumps enable our customers to
provide these state-of-the-art amplifiers to end users of the latest DWDM systems. The
QLM9P48 series of pump lasers is also suitable for telecom, CATV and data communications
applications which require a fixed, narrow-band, stable spectrum over large ranges of
operating powers and temperatures over an extended time period.
Corning Lasertron OptiLock
TM
BGS pump lasers feature designed-in reliability based
on unparalleled experience with 980 nm pump lasers, and over 600 million cumulative
operating hours of more than 60,000 devices in the field.
This product is also available in a low-profile package; contact Corning Lasertron for
more information on model QLM9P49.
Specifications
See specification table and absolute maximum ratings on the following page.
Ordering Information
Base model
QLM9P48ƒllpp,
where:
ƒ
= 2 for 250
µm
Flexcor
TM
fiber; 9 for 900
µm
Flexcor
TM
fiber
ll
= the last two digits of the pump's center emission wavelength
(e.g.
ll
= 75 for 975 nm center emission wavelength)
pp
= the pump kink-free power (in 10 mW increments) divided by ten
(e.g.
pp
= 08 for 80 mW,
pp=
16 for 160 mW and
pp=17
for 165 mW).
For example, to order an OptiLock
TM
fiber Bragg grating stabilized pump laser with
975 nm center emission wavelength, 165 mW kink-free power, and 250
µm
Flexcor
TM
fiber,
the complete model number would be QLM9P4827517.
14
2000
Corning Lasertron 2000 Product Guide
Specifications
(T
laser
= 25 C, T
case
QLM9P48ƒllpp*
o
Contact Corning Lasertron regarding special requirements.
= 0 to 75 C, except as noted)
o
Min
Typ
Max
Laser Characteristics
Rated fiber-coupled kink-free output, P
k
(mW)
customer-specified between 80 and 200 mW*
Optical power stability @ power = 20 mW to P
k
(%)
1
Forward drive current @ rated maximum P
op
(mA)
350
Forward voltage @ rated maximum P
op
(V)
2.5
Threshold I (mA)
25
Center wavelength, peak emission @ rated maximum P
op
(nm)
973-986
Spectrum stability vs. power @ power = 12 mW to P
k
(nm)
0.5
Spectrum stability vs. time @ P
o
, t = 60 sec, T
case
= constant (nm)
0.15
Spectrum stability vs. temperature, T
laser
= 25
o
C, T
laser
= 0 to 75
o
C (nm/
o
C)
0.02
Monitor Photodiode Characteristics
Monitor detector responsivity @ -5 V (µA/mW)
13
2
Monitor dark current @ -5V, I
L
= 0 mA, T
case
= 25
o
C (nA)
100
Thermoelectric Cooler and Thermistor Characteristics
Current @ I
L
= 270 mA,
DT
= 50
o
C (A)
1.2
Voltage @ I
L
= 270 mA,
DT
= 50
o
C (V)
2.7
Thermistor resistance (k)
9.5
10.5
Operating case temperature (
o
C)
0
75
Storage temperature (
o
C)
-40
85
Grating and Fiber Characteristics
Fiber type: Flexcor
TM
1060 Prime, 250
µm
or 900
µm
Primary coating diameter (µm)
230
250
270
Secondary tight buffer coating diameter, 900
µm
only (µm)
850
950
900
Cladding diameter (µm)
122
125
128
Mode field diameter (µm)
5.9
Core-cladding concentricity (µm)
0.5
Fiber/grating proof test level:
(kpsi)
100
(Kg/mm
2
)
70.3
Grating bend radius:
(in)
1
(cm)
2.54
Grating protection diameter, flexible sleeve (µm):
250
µm
900
900
µm
2000
Fiber connector: none
*Specified by customer in increments of 10 mW — see “Ordering Information”on previous page
Absolute Maximum Ratings
Laser Element
Forward current (mA)
Reverse current (mA)
Reverse voltage (V)
Thermistor
Voltage (V)
Current (mA)
Thermoelectric Cooler
Current (A)
Voltage (V)
Package
Storage temperature (
o
C)
Operating temperature (
o
C)
350
25
2
5
2
1.4
3.2
-40 to 85
-20 to 85
2000
Product Information/Lasers
15
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