Description
This Alcatel 1916 LMM contains an Alcatel
DFB laser with monolithically integrated
electro-absor ption modulator (ILM). This
chip provides much lower dispersion
penalties than a directly modulated DFB,
without the complexity of LiN bO3 external
modulators. The Alcatel 1916 LMM is
optimized for ultra long-haul transmission
systems using non-dispersion shifted and
optical fiber amplifiers.
Features
• Very low dispersion penalty over 750 km
of fiber for 2 .5 Gbit/s oper ation
• Wavelength selection according to ITU-T G.692
• Industry-standard 14-pin butterfly package
• High frequency butterfly package with
50 Ω RF impedance
• Low drive voltage ( ≤ 2 Vpp)
• InGaAsP monolithically integrated DFB laser and
modulator chip
• Internal optical isolator
Applications
• STM-16 and OC-48 ultra long-haul
transmission systems
• Terminals for submarine tr ansmission systems
• Digital WDM CA TV transmission
Optical characteristics
Parameter Symb. Conditions Min Typical Max Units
Threshold current Ith CW, Vbias = 0 V 5 17 35 mA
Operating current Iop CW, Vbias = 0 V 60 80 mA
Optical output power PAVE Iop, Vmod, [1] 0 dBm
Laser forward voltage VF CW, Iop, Vbias = 0 V 2 V
Emission wavelength λm See table 1 nm
∆(emitted-tar get) wavelength ∆λe See [3 ] - 0.1 + 0.1 nm
Laser chip tem perature range for tunability Tλ See [3] 20 30 °C
Modulator bias voltage Vbias See [1] - 1 0 V
Modulator drive voltage Vmod See [1] 2 V
Dynamic extinction ratio DER See [1] 10 dB
Side mode suppr ession SMSR @ Iop 35 dB
Cut off fr equency S21 - 3 dB 4 GHz
RF return loss S11 DC to 3 GHz 10 dB
Dispersion penalty ∆s See [1], [2 ], [3] 2 dB
Tracking error TR Tsubmount = 25 °C, Tcase = 65 °C
If = 100 mA, Q = 10 log [P(65 °C)/P(25 °C)] - 0.5 0.5 dB
Rise time / Fall time Tr/Tf See [1], [2], 10%, 90% 140 ps
Wavelength drift vs Tcase ∆λ/∆Tc 0.2 0.5 pm/°C
Monitor diode current Im Iop, VM = - 5 V 0.2 0.5 1.5 mA
Dark current Id 0.1 µA
TEC current It ∆T= 45 °C, Iop= 100 mA, TC
= 65 °C, Vbias= - 1 V 1.3 A
TEC voltage Vt ∆T= 45 °C, Iop= 100 mA, TC
= 65 °C, Vbias= - 1 V 2.5 V
Thermistor resistance RTH
9.5 10.5 KΩ
Notes : All limits start of life Tcase = 25 °C, Tsubmount = 20 °C to 30 °C, Vr = - 5 V, unless otherwise stated.
[1] BER = 10-10
; 2.488 Gbit/s modulation; 223
-1 PRBS; NZR line code; DER ≥ 10dB [2] 7200 ps/nm dispersion, assuming fiber with an average dispersion of 18 ps/nm/km
[4] Tsubmount = Tλ. Tλ is chip temperature required to meet target wavelength (see table 1) [3] 12800 ps/nm dispersion, assuming fiber with an average dispersion of 18 ps/nm/km
Absolute maximum ratings
Parameters Min Max Unit
Operating case temperature 0 65 °C
Stora
g
e tem
p
erature -40 85 °C
Laser forward current 150 m
A
Laser reverse volta
g
e 2
V
Modulator forward volta
g
e 1
V
Modulator reverse volta
g
e 5
V
Photodiode forward current 1 m
A
Photodiode reverse volta
g
e20
V
TEC Volta
g
e2.8
V
TEC Current 1.4
A
ESD a
pp
lied on modulator 500
V
ESD a
pp
lied on laser [1] 2000
V
Lead solderin
g
time
(
at 260°C
)
10 s
Packin
g
Mountin
g
Screw Tor
q
ue 0.2 nm
[1] Human body model Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only.
A
lcatel 1916 L MM
12800 ps/nm W DM 2.5 Gbit/s d i gital Laser Module
w
ith integrated electro-absorption Modulator
Mechanical details
Pin out
N° Description
1Thermistor
2Thermistor
3 Laser DC bias (+)
4 Photodetector Anode (- )
5 Photodetector Cathode (+)
6TEC (+)
7TEC (-)
8 Case Gr ound
9 Case Gr ound
10 No t Connected
11 Laser/modulator ground
12 Modulator Anode/50Ω RF input
13 Laser/modulator ground
14 No t Connected
Ordering information
Alcatel 1916 LMM
Application Part number
7200 ps/nm 3CN 00149 ##
12800 ps/nm 3CN 00397 ##
## defines the wavelength accor ding to the
table1 on the right
50GHz spacing available on 3CN00397##
Standards
ITU-T G.652 optical fiber
IEC 68-2 and MIL STD 883 environment
LASER RADIATION
AVOID EXPOSURE TO BEAM
Class 3 B laser product
ATTENTION
OBSERVE
PRECAUTIONS FOR
HANDLING
ELECTROSTATIC
DISCHARGE
SEN SITIVE DEVICES
λ
λλ
λ7200
ps/nm 12800
ps/nm Conn.
1530,33 FB GR FC/PC
1531,11 FC GT FC/PC
1531,89 FD GV FC/PC
1532,68 FE GX FC/PC
1533,46 FF GZ FC/PC
1534,25 FG HB FC/PC
1535,03 FH HD FC/PC
1535,82 FJ HF FC/PC
1536,61 FK FL FC/PC
1537,39 FL HK FC/PC
1538,18 FM HM FC/PC
1538,97 FN HP FC/PC
1539,76 FP HR FC/PC
1540,55 FQ HT FC/PC
1541,35 FR HV FC/PC
1542,14 FS HX FC/PC
1542,93 FT HZ FC/PC
1543,73 FU JB FC/PC
1544,52 FV JD FC/PC
1545,32 FW JF FC/PC
1546,11 FX JH FC/PC
1546,91 FY JK FC/PC
1547,71 FZ JM FC/PC
1548,51 GA JP FC/PC
1549,31 GB JR FC/PC
1550,11 GC JT FC/PC
1550,91 GD JV FC/PC
1551,72 GE JX FC/PC
1552,52 GF JZ FC/PC
1553,32 GG KB FC/PC
1554,13 GH KD FC/PC
1554,94 GJ KF FC/PC
1555,74 GK KH FC/PC
1556,55 GL KK FC/PC
1557,36 GM KM FC/PC
1558,17 GN KP FC/PC
1558,98 GP KR FC/PC
1559,79 GQ KT FC/PC
1560,60 GR KV FC/PC
Table 1, All wavelengths referenced to vacuum
Tsubmount.
September 00
Copyright © 2000
Alcatel Optronics
Customiz ed versions
are available for
large quantities.
Performance figures contained
in this document must be
specifically confirmed in
writing by Alcatel Optronics
before they become applicable
to any particular or der or
contract. Alcatel Optronics
reserves the right to make
changes to the products or
information contained herein
without notice.
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Tel : (+33) 1 64 49 49 10
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