L8231 and L7551 series are high-speed infrared emitters specifically developed for 1.3 µm band optical fiber communications. These devices
incorporate a high-speed Fabry-Perot laser diode integrated in a receptacle module. Packages are available with various connectors and
mounting styles.
Features
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High-speed Fabry-Perot laser diode
L8231 series: 1.25 Gbps
L7551 series: 2.5 Gbps
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Compatible with single/multi mode optical fibers
Applications
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Optical fiber communications
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Fiber channel
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Gigabit ethernet
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HDTV
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SDH
LASER DIODE
Laser diode
Receptacle type, 1.3 µm, 1.25, 2.5 Gbps
L8231/L7551 series
■ Absolute maximum ratings (Ta=25 °C)
Parameter Symbol L8231 series L7551 series Unit
Ith + 14 (DC) Ith + 16 (DC) mA
Forward current IFIth + 28 (pulse) *1Ith + 32 (pulse) *1mA
Reverse voltage (laserdiode) VR2 V
Reverse voltage (photodiode) VRm20 V
Operating temperature Topr -20 to +70 °C
Storage temperature Tstg -40 to +70 °C
*1: Duty ratio 50 %
■ Electrical and optical characteristics (Typ. Ta=25 °C, IF=Ith +10 mA)
Parameter Symbol L8231 series L7551 series Unit
Peak wavelength λp1.31 1.31 µm
Forward voltage VF1.1 1.1 V
Threshold current Ith 6 9 mA
Fiber end output *2PF0.2 0.2 mW
Rise time tr 250 200 ps
Data rate B1.25 2.5 Gbps
Monitor current (photodiode) Im 0.4 0.5 mA
*2: Measured using a single-mode optical fiber (mode field diameter 9.5 µm) with a master plug.
■ Package lineup
L8231/L7551
Parameter -21 -22 -23 -32 -44
Mounting style Board Panel Board & panel
Connector SC FC MU FC LC
Dimensional outline ➀➁➂➃➄
1
Laser diode
L8231/L7551 series
■ Pin connection
Pin No. L8231 series L7551 series
➀Anode (PD) Cathode (PD)
➁Anode (LD) Cathode (LD)
➂Cathode (LD) Anode (LD)
➃Cathode (PD) Anode (PD)
12.7
9.43.0
10.16 5.08c
0.45 ± 0.1
LEAD
7.5
2.0)(
ba
JIS C5973
SC RECEPTACLE
0.7 ± 0.1
2.75
22.5 ± 0.4
(16)
c
b
a
L8231-21
1.45
21.2 ± 0.4
(10)
L7551-21
12.8 ± 0.1
9.5 ± 0.1
0.45 ± 0.1
LEAD
M8 × 0.75 P
a
(
2.5)
c 11.55 ± 0.1
b
JIS C5970
FC RECEPTACLE
SECTION A/A
2-56 UNC 2B
2 PLCS
(DEPTH: 4)
d
AA
6.1 ± 0.1
9.2 ± 0.1
(5.2)(4)
16.35 ± 0.3
(4.8)
2.8 ± 0.1
(16)
d
c
b
a
L8231-22
15.05 ± 0.3
(3.5)
1.75 ± 0.1
(10)
L7551-22
2.0)(
0.7 ± 0.1
7.62
7.5
9.6
13.53.0
(6.2)
5.082.42
9.35
22.1
ab
0.45 ± 0.1
LEAD
2.0)(
11.551.2
ANSI/TIA/EIA 604-10
LC RECEPTACLE
1.3
(16)
b
a
L8231-44
0
(10)
L7551-44
■ Dimensional outlines (unit: mm, tolerance unless otherwise noted: ±0.2)
KLEDA0034EB
➀ L8231/L7551-21
KLEDA0035EB
➁ L8231/L7551-22
KLEDA0045EA
➂ L8231/L7551-23
KLEDA0036EB
➃ L8231/L7551-32
KLEDA0046EB
➄ L8231/L7551-44
8.5
6.5 9.0
0.45
±
0.1
LEAD
3.0
2.0)(
10.16
0.7 ± 0.1
12.0
5.08
7.5
1.21
20.5 ± 0.4
b
a
1.0
JIS C5983
MU RECEPTACLE
1.3
(16)
b
a
L8231-23
0
(10)
L7551-23
ba
9.25 ± 0.1
13.45 ± 0.1
+0.05
2.0 ± 0.1
1.57 ± 0.1
5.5 ± 0.1
M8 × 0.75 P
(2 ×) 2.2 ± 0.1
7.95 ± 0.1
19
-0.25
JIS C5970
FC RECEPTACLE
2.0)(
0.45 ± 0.1
LEAD
(2 ×) 4.2 ± 0.1
8.8
(16)
b
a
L8231-32
7.5
(10)
L7551-32
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, http://www.hamamatsu.com
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
Information furnished by HAMAMATSU is believed to be reliab le . However, no responsibility is assumed for possible inaccur acies or omissions .
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2002 Hamamatsu Photonics K.K.
Cat. No. KLED1018E04
Jan. 2002 DN
2
