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2 DESCRIPTION Module type FU-68PDF-V520MxxB is a 1.58µm (L-Band) DFB-LD module with polarization maintaining optical fiber. This module is suitable to a CW light source for external modulator for use in 2.5Gb/s and 10Gb/s digital optical communication systems. This module is prepared to expand the wavelength channels into L-Band for Dense-WDM transmission. FEATURES Multi quantum wells (MQW) DFB Laser Diode module (100GHz spacing) Input impedance is 25Ω Emission wavelength is in 1.58µm band Polarization maintaining optical fiber pig-tail Built-in optical isolator Built-in thermal electric cooler Butterfly package With photodiode for optical output monitor APPLICATION High speed transmission systems (~10Gb/s) Dense-WDM systems OPTION Wavelength option: 1565nm~1625nm are available ABSOLUTE MAXIMUM RATINGS () Parameter Symbol Conditions Rating Unit Laser diode Optical output Pf CW 24 mw power Forward current If CW 150 ma Reverse voltage Vrl - 2 V Photodiode Reverse voltage Vrd - 20 V Forward current Ifd - 2 ma Thermoelectric Cooler current Ipe A cooler (Note) Cooler voltage Vpe V Operating case temperature Tc ~ 70 C Storage temperature Tstg ~ 85 C Note) Even if the thermo-electric cooler (TEC) is operated within the rated conditions, uncontrolled current loading or operation without heatsink may easily damage the module by exceeding the storage temperature range. Thermistor resistance should be properly monitored by the feedback circuit during TEC operation to avoid the catastrophic damage.

3 ELECTRICAL/OPTICAL CHARACTERISTICS (, Tc=25 C unless otherwise noted) Parameter Symbol Test Conditions Limits Unit Min. Typ. Max. Threshold current Ith CW ma Operating current Iop CW, Pf=20mW ma Operating voltage Vop CW, Pf=20mW V Input impedance Zin Pf=20mW W Light-emission central λc CW, Pf=20mW (Note 1) nm wavelength Central wavelength drift with λc/ Tc Tc=-20~70 C -1-0 pm/ C case temp. Laser operating temperature Tset C Spectral line width f CW, Pf=20mW MHz Side mode suppression ratio Sr CW, Pf=20mW db Cutoff frequency fc Pf=20mW GHz (-1.5dB optical) Polarization extinction ratio Ex CW, Pf=20mW db Relative intensity noise Nr CW, Pf=20mW, db/hz 0.5~3GHz Tracking error Er Tc=-20~70 C, db (Note 2) APC, ATC Differential efficiency η CW, Pf=20mW mw/ ma Monitor current Imon CW, Pf=20mW, Vrd=5V ma Optical isolation Iso Tc=25 C db Tc=-20~70 C Dark current (PD) Id Vrd=5V, Tc=-20~70 C µa Capacitance (PD) Ct Vrd=5V, f=1mhz pf Note 1) See Table 1. Note 2) Er=max 10 log(pf / Pf@25 C)

4 THERMAL CHARACTERISTICS (, Tc=-20~70 C) Parameter Symbol Test Conditions Limits Unit Min. Typ. Max. Thermistor resistance Rth Tld=25 C k W B constant of Rth B K Cooling capacity T Pf=20mW, Tc=70 C C Cooler current Ipe Pf=20mW, Tc=65 C, A Pf=20mW, Tc=70 C, A Cooler voltage Vpe Pf=20mW, Tc=65 C, V Pf=20mW, Tc=70 C, V FIBER PIGTAIL SPECIFICATIONS Parameter Limits Unit Type PM (Note 3) - Mode field diameter 11+/-1 µm Cladding diameter 125+/-3 µm Secondary coating outer diameter 0.9+/-0.1 mm Polarization axis slow axis - Connector FC/PC - Optical return loss of connector 40 (min) db Note 3) PMF - Sumitomo Panda fiber (PM-155) DOCUMENTATION () Fiber output power vs. Laser forward current at and Tc=-20,25,70 C Threshold current (Ith) Laser forward current (Iop) at Pf=20mW Laser forward voltage (Vop) at Pf=20mW Laser operating temperature (Tset) at λc (Note 4) Monitor current (Imon) at Pf=20mW Thermistor resistance (Rth) Cooler current (Ipe) at Pf=20mW and Tc=70 C Cooler voltage (Vpe) at Pf=20mW and Tc=70 C Note 4) Tset is attached as a reference data. Rth should be used in order to tune the wavelength to the specified value accurately.

5 Table 1. Type number λc (nm) Type number λc (nm) Type number λc (nm) FU-68PDF-V520M103B FU-68PDF-V520M139B FU-68PDF-V520M175B FU-68PDF-V520M104B FU-68PDF-V520M140B FU-68PDF-V520M176B FU-68PDF-V520M105B FU-68PDF-V520M141B FU-68PDF-V520M177B FU-68PDF-V520M106B FU-68PDF-V520M142B FU-68PDF-V520M178B FU-68PDF-V520M107B FU-68PDF-V520M143B FU-68PDF-V520M179B FU-68PDF-V520M108B FU-68PDF-V520M144B FU-68PDF-V520M180B FU-68PDF-V520M109B FU-68PDF-V520M145B FU-68PDF-V520M181B FU-68PDF-V520M110B FU-68PDF-V520M146B FU-68PDF-V520M182B FU-68PDF-V520M111B FU-68PDF-V520M147B FU-68PDF-V520M183B FU-68PDF-V520M112B FU-68PDF-V520M148B FU-68PDF-V520M184B FU-68PDF-V520M113B FU-68PDF-V520M149B FU-68PDF-V520M185B FU-68PDF-V520M114B FU-68PDF-V520M150B FU-68PDF-V520M186B FU-68PDF-V520M115B FU-68PDF-V520M151B FU-68PDF-V520M187B FU-68PDF-V520M116B FU-68PDF-V520M152B FU-68PDF-V520M188B FU-68PDF-V520M117B FU-68PDF-V520M153B FU-68PDF-V520M189B FU-68PDF-V520M118B FU-68PDF-V520M154B FU-68PDF-V520M190B FU-68PDF-V520M119B FU-68PDF-V520M155B FU-68PDF-V520M191B FU-68PDF-V520M120B FU-68PDF-V520M156B FU-68PDF-V520M192B FU-68PDF-V520M121B FU-68PDF-V520M157B FU-68PDF-V520M193B FU-68PDF-V520M122B FU-68PDF-V520M158B FU-68PDF-V520M194B FU-68PDF-V520M123B FU-68PDF-V520M159B FU-68PDF-V520M195B FU-68PDF-V520M124B FU-68PDF-V520M160B FU-68PDF-V520M196B FU-68PDF-V520M125B FU-68PDF-V520M161B FU-68PDF-V520M197B FU-68PDF-V520M126B FU-68PDF-V520M162B FU-68PDF-V520M198B FU-68PDF-V520M127B FU-68PDF-V520M163B FU-68PDF-V520M199B FU-68PDF-V520M128B FU-68PDF-V520M164B FU-68PDF-V520M200B FU-68PDF-V520M129B FU-68PDF-V520M165B FU-68PDF-V520M201B FU-68PDF-V520M130B FU-68PDF-V520M166B FU-68PDF-V520M202B FU-68PDF-V520M131B FU-68PDF-V520M167B FU-68PDF-V520M203B FU-68PDF-V520M132B FU-68PDF-V520M168B FU-68PDF-V520M204B FU-68PDF-V520M133B FU-68PDF-V520M169B FU-68PDF-V520M205B FU-68PDF-V520M134B FU-68PDF-V520M170B FU-68PDF-V520M206B FU-68PDF-V520M135B FU-68PDF-V520M171B FU-68PDF-V520M207B FU-68PDF-V520M136B FU-68PDF-V520M172B FU-68PDF-V520M208B FU-68PDF-V520M137B FU-68PDF-V520M173B FU-68PDF-V520M209B FU-68PDF-V520M138B FU-68PDF-V520M174B All wavelengths are referred to vacuum. Tolerance is λc+/-0.05nm.

6 TZ B (6/6) MITSUBISHI (OPTICAL DEVICES) OUTLINE DIAGRAM (Unit : mm) 28.4 MITSUBISHI ELECTRIC CORPORATION