2000
Corning Lasertron 2000 Product Guide
Preliminary
30
QLM716
Directly Modulated
DWDM DFB Laser Module
Absolute Maximum Ratings
Laser Element (T = 25°C)
Fiber-coupled optical power (mW)
Forward current (mA)
Reverse voltage (V)
Reverse current (mA)
Monitor Detector (T = 25°C)
Reverse photocurrent (mA)
Reverse voltage (V)
Forward current (mA)
Thermistor
Voltage (V)
Current (mA)
Thermoelectric Cooler
Current (A)
Voltage (V)
Temperature differential (oC)
Package
Storage temperature (oC)
Operating case temperature (oC)
Operating laser temperature (oC)
Lead soldering temperature (oC)
Lead soldering duration (sec)
Fiber yield strength (N)
Fiber bend radius (mm, min)
10
150
2
2
1
15
2
5
2
1.5
2
50
-40 to 85
-15 to 65
15 to 35
260
10
10
30
■Digital transmission up to 2.5 Gb/s
■5 mW rated output power
■Wavelength-selectable from 1526 to 1602 nm
■Fiber span lengths of 100 km
Pin Connections (See page 49 for detailed schematic)
1 Thermistor
2 Thermistor
3 Laser Cathode, DC Bias (-)
4 Monitor Anode (-)
5 Monitor Cathode (+)
6 Cooler (+)
7 Cooler (-)
8 Case Ground, Laser Anode
9 Case Ground, Laser Anode
10 Case Ground, Laser Anode
11 Case Ground, Laser Anode
12 Laser Cathode, RF Modulation
13 Case Ground, Laser Anode
14 Case Ground, Laser Anode
Specifications Contact Corning Lasertron regarding special requirements.
(Tlaser = Tl, Tcase = -15 to 65oC, except as noted)
5
see table
<1
>35
<40
<100
<62
>0.08
<2
25
>2.5
<±1.5
>100
>0.05
<0.15
<±0.5
<1
<2
10
15 to 35
6.5 to 13.1
100
<2
Rated Output Power, Po (mW)
Laser Characteristics
Wavelength (nm)
Spectral width (nm, -20 dB)
Side mode suppression ratio (dB)
Threshold current (mA)
Output power at threshold (µW)
Modulation current (mA)
Slope efficiency (W/A)
Forward voltage (V)
Input impedance (Ohms)
Frequency response, -3 dB (GHz)
Frequency response flatness to 2.5 GHz (dB)
Monitor Photodiode Characteristics
Monitor current at Po (µA)
Monitor responsivity (A/W)
Monitor dark current (µA)
Tracking error relative to 25oC (dB)
Thermoelectric Cooler Characteristics
Current (A)
Voltage (V)
Thermistor Characteristics
Thermistor resistance at 25oC (K Ohms)
Tlaser at Tl (oC)
Thermistor resistance at Tl (K Ohms)
2.5 Gb/s System Performance
Fiber span (km)
Dispersion penalty (dB)
Description
Corning Lasertron QLM716 DFB modules are designed for use in dense wavelength
division multiplexing (DWDM) systems with transmission rates up to 2.5 Gb/s and fiber
span lengths of 100 km. Standard products are defined at the ITU 100 GHz channel
spacings. Modules are also available with any wavelength from 1526 to 1602 nm. These
modules feature the same “miniature optical bench” construction as Corning Lasertron
single-channel QLM3S700, QLM5S710 and WDM QLM715 DFB laser modules for
extremely stable performance over temperature and module lifetime.
QLM5S716 -02xx