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Features subject to change - not contractually valid unless specifically authorized by Pirelli
wavelength accuracy.The laser, fully Telcordia GR-468-CORE qualified, does not require moving
parts to achieve tunability.
The conceptualblock scheme of thetunable laser includesa conventionalFabry-Perot laser chip,voltage-controlled tunablemirror and atemperature-stabilitysystem.Pirelli DTL is designedto provide fast switchingover a 50 GHz channelgrid. No wavelength lockeris needed to achievefrequency stability, andthe laser is compatiblewith 25 GHz DWDMchannel spacing.
DTL
_04/
2008
Features subject to change - not contractually valid unless specifically authorized by Pirelli
nDTL Series High Power Full C-Band or L-Band tunable laser source
Applications
• Sparing for DWDM line cards • Dynamic provisioning • Dynamic Add/Drop • Channel protection • Agile wavelength routing (wavelength conversion) • Testing and measurement
Features
• Settable output power• Full C-band or L-band tunability • 50 GHz DWDM applications • Superior SMSR • High line stability • Narrow Linewidth • Fast tuning time
Dynamically Tunable Laser
Pirelli DTL calibration procedure,as the active control loop,involves only three, independent,control parameters.This makes the automatic searchalgorithm for the control matrixparticularly fast and reliable.The entire calibration proceduretakes few minutes and it is fullyautomatic.
Notes:1- 89 channels or 98 channels. Tuning range is settable within the Frequency range window 2- Discrete Tuning function over the frequency grid specified in the ITU recommendations 3- Instantaneous 3 dB value4- Over 10 MHz – 10 GHz frequency range, @ Pout=+13 dBm 5- Including connector - LD polarization output state is aligned to slow axis
ELECTRO-OPTICAL CHARACTERISTICS (TCASE =-5 to 75 °C over lifetime whereas otherwise specified)Item Symbol Min. Typ. Max. UnitLD Operative Current Iop - 300 400 mALD Forward Voltage Vop - 1 2.5 VPD Responsivity RPD 5 - 80 mA/mW
PD Monitor Dark Current Idark PD - 1 5 nAPD Capacitance (Vr=5V) CPD - 4 7 pFTEC Current ITEC - - 1.5 ATEC Voltage VTEC - - 2.8 VThermistorOB Resistance Rth OB 5 8 11 kOhmThermistorAmbient Resistance Rth A 1.3 - 55.3 kOhmThermistor Resistance (T=25° C) Rth 9.5 - 10.5 kOhmPhase Adjuster Resistance RPA 45 - 55 OhmPhase Adjuster Power PPA - - 0.2 WTunable Mirror voltage (rms) VTM 2.5 - 45 VChannel voltage separation (rms) Dvchannels 110 - - mVTunable Mirror voltage Waveform Square – 100KHzTM Voltage recommended Rise time1 Rt 10 - 50 nsTM Voltage recommended Fall time1 Ft 10 - 50 nsPower Dissipation P - 2.5 3.5 W
ABSOLUTE MAXIMUM RATINGSItem Symbol Max. UnitLD forward current ILD 700 mAOptical Output power POUT 20 dBmOptical Safety Class 1M as per IEC 60825-1PD reverse current IrPD 5 mAPD forward current IfPD 25 mATEC current ITEC 2 ATM Tuning voltage VTM 100 VTM Residual DC voltage VDCTM 50 mVPhase Adjuster Maximum Power PPA 1.5 WLead soldering temperature Tsold 260 °CLead soldering Time tsold 10 sElectro Static Discharge1 ESD 500 V
Notes:1- Human body model (R=1.5 K – C=100 pF)
STORAGE CONDITIONSItem Symbol Min. Max. UnitStorage Case Temperature Range