NX8564/8565/8566LE SERIES
ELECTRO-OPTICAL CHARACTERISTICS (TLD = Tset, TC = -20 to +70ºC, unless otherwise specified)
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT
Laser Set Temperature Tset *1 20 35 °C
Operating Current Iop 50 60 80 mA
Modulation Center Voltage Vcenter Under modulation *2 −1.5 −1.2 −0.5 V
Modulation Voltage Vmod Under modulation *2 2 3 V
Forward Voltage of LD VFLD IFLD = Iop 1.6 2.0 V
Threshold Current Ith 7 20 mA
Optical Output Power from Fiber PfIFLD = Iop, Under modulation *2
(NX8564/65LE Series)
−5−2 dBm
IFLD = Iop, Under modulation *2
(NX8566LE Series)
0 1
Peak Emission Wavelength λpIFLD = Iop, VEA = 0 V 1528 ITU-T *3 1565 nm
1574 1609
Side Mode Suppression Ratio SMSR IFLD = Iop, VEA = 0 V 30 > 37 dB
Extinction Ratio ER IFLD = Iop, Under modulation *2 10 > 11 dB
Rise Time trIFLD = Iop, 20-80%, Under modulation *2 70 125 ps
Fall Time tfIFLD = Iop, 80-20%, Under modulation *2 70 125 ps
Dispersion Penalty DP IFLD = Iop, Under modulation *2, 4 < 1.5 2.0 dB
Isolation Is23 dB
Relative Intensity Noise RIN 10 MHz to 10 GHz, VEA = 0 V, IFLD = Iop < −135 −130 dB/
Hz
Input Return Loss S11 IFLD = Iop, VEA = −1 V, 50 Ω,
f = 130 MHz to 2 GHz
−8 dB
IFLD = Iop, VEA = −1 V, 50 Ω,
f = 2 to 2.5 GHz
−5
*1 NX8564/65/66LE Series : Tset is a certain point between 20 and 35°C
NX8564/65/66LE××× Series : Tset is set at a certain point between 20 and 35°C for ITU-T grid wavelength
*2 NX8564LE : C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
NX8565LE : C-band 600 km, L-band 480 km (10800 ps/nm) SMF under modulation
NX8566LE : C-band 240 km, L-band 192 km (4320 ps/nm) SMF under modulation
2.48832 Gb/s, PRBS 223−1, VEA = Vcenter ± 1/2Vmod, IFLD = Iop, TLD = Tset, NEC Test System
Vcenter : a certain point between −1.5 and −0.5 V
Vmod : a certain point 3 V or below
Iop : a certain point between 50 and 80 mA
*3 Available for DWDM wavelengths based on ITU-T recommendations (100 GHz grid).
Please refer to ORDERING INFORMATION.
*4 BER = 10−10