ML7XX14 SERIES
TYPE
NAME ML725B14F
MITSUBISHI LASER DIODES
InGaAsP DFB-LASER DIODES
DESCRIPTION
ML7XX14 series are MQW*-DFB** laser diodes emitting
light beam around 1310nm.
They are well suited for light source in long distance analog
transmission system for example cable television (CATV).
The ML7XX14 is able to operate in wide temperature rang from
-40ºC to +85ºC
ML725B14F are hermetically sealed devices with the photo
diode for optical output monitoring.
* MQW : Multiple Quantum Well
** DFB : Distributed Feedback
FEATURES
Excellent low distortion characteristic
CSO (typ. -50dBc)
CTB (typ. -55dBc)
Modulation depth m = 3.5%/channel
Po > 5mW
20 km single mode
fiber
Low relative intensity noise characteristic
(typ.
-155dB/Hz)
Low threshold current (Max.
20mA@25ºC)
High slope efficiency (Min.
0.3mW/mA@25ºC)
High side mode suppression ratio (typ. 40dB)
APPLICATION
Analog optical communications, such as CATV
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL/OPTICAL CHARACTERISTICS (Tc=25ºC
MITSUBISHI
ELECTRIC
mA
Symbol Parameter Test conditions Min. Typ. Max Unit
Ith Threshold current CW -620
mA
Iop Operation current CW,Po=5mW -18 40 mA
Slope efficiency CW,Po=5mW 0.3 --
V
Vop Operating voltage CW,Po=5mW 1.2 1.8
mW/mA
pPeak wavelength CW,Po=5mW, Tc=-40 to +85ºC 1290 1310 1330 nm
Beam divergence angle
(Full angle at half maximum)
CW,Po=5mW 25 deg.
CW,Po=5mW
0.05 0.2 -
-
SMSR Side mode suppression ratio CW,Po=5mW , Tc=-40 to +85ºC
ImCW,Po=5mW
35-
-3040
30 40 - dB
Monitoring output current
CW, Tc=85ºC
CW,Po=5mW, Tc=85ºC
-30 40
CSO
CTB
Composite second order
Composite triple beat
78 channel transmission test
modulation depth
m=3.5%, Po>5mW, 20Km SMF
Tc=-40 to 85ºC
dB/Hz- -155 -
RIN CW,Po=5mWRelative intensity noise
- -50 -42
dB
- -55 -46
-50 75
IFD Forward current (Photo diode) -2mA
Symbol Paramete
r
Conditions Ratings Unit
Po Light output power CW 8mW
VRL Reverse voltage (Laser diode) -2V
VRD Reverse voltage (Photo diode) -20 V
Tc Case temperature -
Tstg Storage temperature --40to+100 ºC
ºC
-40to+85
Iop Forward current (Laser diode) -150 mA
JAN. 2002
ML725B14F
LDPD
(3)
(2) (1)
(4)
Case
(1)
1.0Min.
2.0Min.
3.55±0.1
5.6 +0
-0.03
1.27±0.03
0.25±0.03
Glass
18 ±1 2.1±0.15
1.2
±0.1
4- 0.45±0.05
(2)
1±0.1
2-90
2.0±0.25
(P.C.D.)
4.25
(3)
(4)
(0.25)
(0.25)
Reference Plane
Emitting Facet
(1) (2)
✜✱❊❆❊ ✢
mm
OUTLINE DRAWINGS
ML725B14F
ML7XX14 SERIES
MITSUBISHI LASER DIODES
InGaAsP DFB-LASER DIODES
JAN. 2002
