NEC's 1550 nmInGaAsP MQW DFB

LASER DIODE IN COAXIAL PACKAGEfor 622 Mb/s APPLICATION

NX8504BE-CCNX8504CE-CC

FEATURES• PEAK EMISSION WAVELENGTH:λP = 1550 nm

• OPTICAL OUTPUT POWER:Pf = 2.0 mW

• INTERNAL OPTICAL ISOLATOR

• InGaAs MONITOR PIN-PD

• WIDE OPERATING TEMPERATURE RANGE:TC = -10 to +85°C

• WITH SC-UPC CONNECTOR

• BASED ON TELCORDIA RELIABILITY

NEC's NX8504BE-CC and NX8504CE-CC are 1550 nm Dis-tributed Feed-Back (DFB) laser diode coaxial modules withoptical isolator.

These modules are ideal as a light source for SynchronousDigital Hierarchy (SDH) system, STM-4, long-haul L-4.2, L-4.3ITU-T recommendations.

DESCRIPTION

California Eastern Laboratories

PART NUMBER NX8504BE-CC, NX8504CE-CC

SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX

Pf Optical Output Power from Fiber, CW mW 2.0

VOP Operating Voltage, Pf = 2.0 mW V 1.1 1.6

ITH Threshold Current TC = +25°C mA 15 25mA 2 50

PTH Threshold Output Power, IF = ITH µW 100

IMOD Modulation Current Pf = 2.0 mW, TC = 25°C mA 11 20 35Pf = 2.0 mW mA 9 55

ηd Differential Efficiency Pf = 2.0 mW, TC = 25°C W/A 0.060 0.100 0.150Pf = 2.0 mW W/A 0.036 0.200

∆ηd Temperature Dependence of Differential Efficiency, dB -3 -1.6

Kink Kink, Pf = Up to 2.4 mW (Refer to defenitions) % ±20

λp Peak Emission Wavelength, Pf = 2.0 mW nm 1530 1550 1570

∆λ/∆T Temperature Dependence of Peak Emission Wavelength nm/°C 0.10 0.12

∆λ Spectral Width, Pf = 2.0 mW, -20 dB down width nm 0.3 1.0

SMSR Side Mode Suppression Ratio, Pf = 2.0 mW dB 30 40

tr Rise Time, 10 to 90%, Ppk = 2.0 mW, IF = ITH ns 0.5

tf Fall Time, 90 to 10%, Ppk = 2.0 mW, IF = ITH ns 0.5

Im Monitor Current, VR = 5 V, Pf = 2.0 mW µA 200 1000 2000

ID Monitor Dark Current VR = 5 V, TC = 25 °C nA 1.0 50VR = 5 V nA 10 500

Ct Monitor PD Terminal Capacitance, VR = 5 V, f = 1 MHz pF 1.0 20

LINm Linearity, VR = 5 V, Pf = 0.2 to 2.0 mW (Refer to defenitions) % 10

γ1 Tracking Error, Im = const. (Refer to defenitions) dB 0.5 1.0

ELECTRO-OPTICAL CHARACTERISTICS (TC = -10 to +85°C, unless otherwise specified)

∆ηd = 10 logηd (@ TC °C)

ηd (@ 25 °C)

DISCO

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ABSOLUTE MAXIMUM RATINGS1

(TC = 25°C, unless otherwise specified)

SYMBOLS PARAMETERS UNITS RATINGS

IF Forward Current of LD mA 150

Pf Optical Output Power mW 5.0

VR Reverse Voltage of LD V 2.0

IF Forward Current of PD mA 2.0

VR Reverse Voltage of PD V 15

TC Operating Case Temperature °C -10 to +85

TSTG Storage Temperature °C -40 to +85

TSLD Lead SolderingTemperature (10 s) °C 260

RH Relative Humidity, % 85(noncondensing)

Note:1. Operation in excess of any one of these parameters may result

in permanent damage.

NX8504BE-CC, NX8504CE-CC

PARAMETER DEFINITIONS

2.4

PK

0

IF - Pf

dPodPK

IF - ηd

IF(mA)

(mW)

Pf

kink = x 100 [%]|dPK|PK

dPK = dPo MAXPK ≤ 2.4 (mW)

Kink : kink

PK

0

dPo

dPL

Pf

Im(mA)

(mW)

0.2

PL

2.0 LINm = x 100 [%]|dPL|PL

dPL = dPo MAX0.2 < PL < 2.0 (mW)

Linearity : LINm

0

Pf

Im Im(mA)

(mW)

Pf

2.0

TC = 25°C

TC = -10 to +85C

γ = |10 log | [dB]Pf

2.0

Tracking Error : γγγγγ

DISCO

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FOWARD CURRENT vs.FORWARD VOLTAGE

OPTICAL OUTPUT POWER vs.FORWARD CURRENT

Thr

esho

ld C

urre

nt, I

TH (

mA

)O

pera

tion

Cur

rent

, IO

P (

mA

)O

Ptic

al O

utpu

t Pow

er ,

Pf (

mW

)

Forward Current, IF (mA)

TYPICAL PERFORMANCE CURVES (TC = 25°C, unless otherwise specified)

TC

= -

40°C

25°C

85°C

4.0

100806040200

1.0

2.0

3.0

4.0

2.01.61.20.80.40.0

1.0

2.0

3.0

+85°C

+25°CTC = -40°C

ITH

IOP at Pf = 2 mW

100

10

1

-60 100806040200-20-40

50�

2.52.0�1.5�1.0�0.5�0�

10�

20�

30�

40�

OPTICAL OUTPUT POWER vs.MONITOR CURRENT

OP

tical

Out

put P

ower

, P

f (m

W)

Monitor Current, IM (mA)

Case Temperature, TC (°C) Forward Voltage, VF (V)

OPERATING CURRENT ANDTHRESHOLD CURRENT vs.

CASE TEMPERATUREF

orw

ard

Cur

rent

, IF (

mA

)

Remark: The graphs indicate nominal characteristics

NX8504BE-CC, NX8504CE-CC

TEMPERATURE DEPENDENCE OFDIFFERENTIAL EFFICIENCY FROM FIBER

Pea

k E

mis

sion

Wav

elen

gth,

λp

(nm

)

Diff

eren

tial E

ffici

ency

from

Fib

er, η

d (W

/A)

TEMPERATURE DEPENDENCE OFPEAK EMISSION WAVELENGTH

0.18

0.12

0.06

0.00-60� 10080�60�40�20�0�-20�-40�

1560�

1550�

1540�

-60� 10080�60�40�20�0�-20�-40�

1555�

1545�

Case Temperature, TC (°C) Case Temperature, TC (°C)

DISCO

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NX8504BE-CC, NX8504CE-CC

TYPICAL PERFORMANCE CURVES (TC = 25°C, unless otherwise specified)

LONGITUDINAL MODE FROM FIBER

Rel

ativ

e In

tens

ity, (

dB)

Time Base (500 ps/div.)

Rel

ativ

e In

tens

ity, (

dB)

EYE DIAGRAM

10

1560.41550.41540.4

-70

-60

-50

-40

-30

-20

-10

0

622 Mb/s-NRZ, Ref = -14dB,2 Vp-p (6 dB ATT), IB = ITH X 0.9

Wavelength, λ (nm)

ERROR RATE CHARACTERISTICS

Bit

Err

or R

ate

back to back

after 200 km

TC = -40°C,Ref = -14 dB,622 Mbps-NRZ,2 Vp-p,IB = ITH X 0.9

10-6

-34-35-36-37-38-39-40

10-12

10-11

10-10

10-9

10-8

10-7

-33

back to back

after 200 km

TC = 25°C,Ref = -14 dB,622 Mbps-NRZ,2 Vp-p,IB = ITH X 0.9

10-6

-34-35-36-37-38-39-40

10-12

10-11

10-10

10-9

10-8

10-7

-33

back to back

after 200 km

TC = 85°C,Ref = -14 dB,622 Mbps-NRZ,2 Vp-p,IB = ITH X 0.9

10-6

-34-35-36-37-38-39-40

10-12

10-11

10-10

10-9

10-8

10-7

-33

Average Received Power, P (dBm)

Remark: The graphs indicate nominal characteristics

DISCO

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NX8504BE-CC, NX8504CE-CC

NX8504BE-CC NX8504CE-CC

OUTLINE DIMENSIONS (Units in mm)

3.7±0.3

2.0±0.2

4.0±0.2

φ7±0.2

Optical Fiber(SMF)Length: 0.5 mWith SC connector

15

8.2

φ3.2±0.25

2±φ2.2

φ0.45±0.05

φ0.9

φ6±0.1

PD

CASE1.0±0.1LD

P.C.D. = φ2

27.8±1.0

20±1.0

12.7±0.217.0±0.2

4

1

3

2

4 3

1 27.2±0.3

φ7±0.2

0.5±0.2

15

8.2

0.3

φ3.2±0.25

4-φ0.45±0.05

φ0.9

PD

CASE

φ16

LD

P.C.D. = φ22-φ2.5

28.1±1.0

19.5±1.02.5±1.0

4

1

3

2

12±0.1516.0

7±0.24

3 12

0.3

Optical Fiber(SMF)Length: 0.5 mWith SC connector

35±2 mm

Fiber Length: 500±50 mm

SC-UPC Connector

8.99±0.5 mm

PARAMETER SPEC UNIT

Mode Field Diameter 9.5±1 µm

Cladding Diameter 125±2 µm

Maximum Cladding Noncircularity 2 %

Maximum Core/Cladding Concentricity 1.6 %

Outer Diameter 0.9±0.1 mm

Cut-off Wavelength 1100 to 1270 nm

Minimum Fiber Bending Radius 30 mm

Fiber Length 500±50 mm

Flammability UL1581 VW-1

OPTICAL FIBER CHARACTERISTICS

PART NUMBER AVAILABLE CONNECTOR DESCRIPTION

NX8504BE-CC With SC-PC Connector

NX8504CE-CC

ORDERING INFORMATION

Flat Mount Flange

Vertical MountFlange

PIN CONNECTIONS

PIN CONNECTIONS

A Business Partner of NEC Compound Semiconductor Devices, Ltd.

03/03/2003

Life Support ApplicationsThese NEC products are not intended for use in life support devices, appliances, or systems where the malfunction of these products can reasonably be expected to result in personal injury. The customers of CEL using or selling these products for use in such applications do so at their own risk and agree to fully indemnify CEL for all damages resulting from such improper use or sale. DIS

CONTI

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