10Gb/s Tunable Transmitter Assembly (TTA)

Transcription

1 10Gb/s Tunable Transmitter Assembly (TTA) TL7000NCD Negative Chirped Modulator TL7000ZCD Zero Chirped Modulator Features: Full C-Band tunable source ( nm) based on OIF itla footprint High power +3dBm EOL (modulated) High speed electronic tuning control (<10ms channel to channel) Electronic shutter - output power control and switching Low power dissipation, 2.0W typical Narrow line-width Excellent SMSR Low RIN over full power range Wavelength stabilized for 50GHz or 100GHz ITU-T channel spacing Integrated -ve pre-chirped InP MZ modulator, externally driven Zero chirped modulator options available L band options available FM Dither / Tracetone capability Case operating temperature range -5ºC to +75ºC Simple RS232 interface Telcordia qualified RoHS 5/6 compliant Applications: Long Haul Regional Metro Test and Measurement The Oclaro Tunable Transmitter Assembly (TTA) is a high performance continuous wave (CW) tunable laser source combined with a 10Gb/s InP MZ modulator for use in the C band window covering 1528nm to 1565nm. The laser and control electronics are pre-mounted on a dedicated circuit board for easy production installation. The TTA features shuttered tuning, optical power control, trace tone and FM dither circuitry. Comprehensive control and system reporting is provided over the RS232 interface. All MZ data and bias inputs are provided on connectors to allow the customer full control over the MZ data and biasing schemes. The TTA implements the Oclaro DSDBR wideband tunable laser and InP MZ. This laser is a fully monolithic InP chip designed for high volume, low cost manufacturing. With no moving parts, it is a low voltage electronically tuned device enabling rapid wavelength switching with straightforward control electronics. Optical output power can be controlled by means of the integrated semiconductor optical amplifier (SOA) which also acts as a shutter to allow dark tuning when reverse biased. The Oclaro InP Mach-Zehnder modulator provides superior performance compared to an EML modulator and comparable performance to lithium niobate Mach- Zehnder modulators. However the InP MZ also enables multi component integration. Laser operation is at a fixed temperature. Wavelength stability is guaranteed by an internal wavelength locker for control to a 50GHz or 100GHz ITU wavelength grid. 1

2 Optical Characteristics The following parametric limits detailed are for a case temperature range of -5 C to 75 C unless otherwise stated. Parameter Min Typ Max Unit Conditions Output Power dbm Variation in optical output power over the wavelength range ±db Frequency Range THz EOL mean modulated, SOL set power +4.2dBm[4] Fixed set power value and fixed case temperature C band, 93channels 50Ghz Spacing Wavelength Range nm C band No of Channels 93 50GHz spacing SMSR db Linewidth 1 5 MHz Lorentzian RIN (DC-1GHz) (1-10GHz) db/hz Average RIN OSNR db 0.1nm optical bandwidth Return Loss -27 db Back Reflection Tolerance -14 db For RIN <-145dB/Hz Locked frequency accuracy GHz EOL, over channel and operational temperature ranges Shuttered output power dbm Modulator set to operate Linewidth for Brillouin suppression MHz Brillouin frequency selection khz Note [1] Trace Tone Frequency khz Note [1] Trace Tone Modulation Depth 4 10 % Tuning Speed 10 ms Various scenarios apply[2] TTA cold-start initialization time 60 s Note [3] Notes: [1] The Oclaro TTA incorporates a single onboard oscillator which is used to provide either non-linearity suppression or Trace Tone functionality, but cannot provide both functions simultaneously. [2] The Oclaro laser is guaranteed to tune within 10ms which is to comply with the OIF "Application A" (SONET/SDH Protection), however, this applies only for tuning between channels, with or without the laser enabled (host sending the change channel command only). Enabling the laser from a disabled state will take longer, as the tuning has to be executed more slowly, in order to comply with the ramped power vs frequency mask specification. In either case, the host must monitor, process and respond appropriately to the status bits of the itla out-bound (module to host) response packet, generated in response to each host command. The above figures do not include dynamic MZ control loop optimization/settling times. [3] Time required from application of Vcc and Vee supplies for the TTA to reach an operational state. Complies with the OIF MSA module warm up time. The above figures do not include dynamic MZ control loop optimization/settling times. [4] Optical power must be set to +4.2dBm at SOL to guarantee the EOL power range. 2

3 itla Frequency versus Power Mask The itla is guaranteed to comply with the frequency versus power mask shown below. This mask applies during itla power enable and disable operations and also during channel changing operations. Pnom dbm Pnom-16dB Pnom-37dB -16GHz -2.5GHz +2.5GHz -10GHz +10GHz f ITU +16GHz Channel commissioning ALS pulsing The DIS pin can be toggled to enable pulsing to provide ALS signaling during optical system channel commissioning and optimization. The mask below shows the power versus time profile. Wavelength accuracy during ALS signaling (optical power range PNOM -3dB) is defined as ITU +/-16GHz, SOL and EOL. P nominal < -30dBm <300us <2ms 2.5ms min <300us DIS enable DIS disable Note: [1] Latency, ramp-up and ramp-down time periods are variable within the maximum values shown. [2] Steady state time period is defined by the DIS pin toggle period minus the latency, ramp-up and ramp-down time periods. [3] InP Mach-Zehnder dynamic MZ control loop optimization/settling times are not included. 3

4 Modulator Characteristics The following parametric limits detailed are for a case temperature range of -5 C to 75 C. Parameter Min Typ Max Unit Comment Isolation resistance MZ arms to GND 16 kω Data_bar arm DC bias voltage V Data arm DC bias voltage V MZ modulator Arm DC bias current 10 ma DC photocurrent Complementary power monitor bias voltage V Complementary power monitor mean voltage ma Differential modulation voltage V Optical extinction ratio (filtered) EOL Negative chirped modulator Zero chirped Rise time (20/80) 35 ps Fall time (20/80) 35 ps Input return loss (S11) 0 4 GHz 4 9 GHz Note [2] Assumes modulator is modulated with a 50/50 markspace ratio db Note [1] Electro-optic bandwidth (-3dB) (S21) GHz Each modulator input Note: [1] Test Conditions: Gb/s, 2^31-1 PRBS NRZ data. Measured with a Tektronix CSA8000 DCA and 80C02 optical plug-in module. RF driver Vpp optimised at SOL and operated with a dynamic MZ control loop. [2] Input S11 return loss -13dB at 4GHz rising linearly to -5dB at 9GHz. Optical Systems Performance db The following systems performance parametric limits apply for each InP Mach-Zehnder modulator type integrated within the TTA. Parameter Min Typ Max Unit Comment Dispersion receiver power penalty Negative chirped modulator 2 3 db 0 to ps/nm Note[1] -500 to 0 ps/nm Note[1] Dispersion receiver power penalty Zero chirped modulator 1.8 db -800 to +800 ps/nm Note[1] Note: [1] Test Conditions: Gb/s, PRBS NRZ data, OSNR0.1 >35dB, reference optical Receiver CDR optimized for amplitude and phase, BER <10-10, ITU-T G652 fibre. Choice of modulator driver can affect systems performance. Refer to Oclaro for recommended RF drivers. 4

5 Electrical Characteristics Parameter Min Typ Max Unit Conditions +3V3 supply voltage V Comment +3V3 supply current ma Maximum current at TCASE=TOP maximum -5.2V supply voltage V -5.2V supply current 100 ma During Shutter operation only Power Dissipation W LVTTL Input VIN LOW 0.8 V Input low limit follows power rail LVTTL Input VIN HIGH 2.0 V Input high limit follows power rail LVTTL Input Vout LOW 0.5 V LVTTL Input Vout HIGH 2.4 V Power Supply Noise 1 %rms 100Hz to 20MHz RS232 Interface Baud Default 9600 baud Environmental Characteristics Parameter Min Typ Max Unit Conditions Storage Temperature ºC 72 hrs maximum Operating Temperature ºC With Suitable heatsink Electrostatic Discharge 500 V MIL-STD-883, Method 4 Flammability VO Fibre coat UL94-HB <1gm mass 5

6 TTA Block Diagram 8W Connector SOA Amplify Shutter Trace Tone + DSDBR LASER & InP MZ Thermistor Amplifier TEC Switching Driver GPPO Locker TIA Locker Control Wavelength Tuning Current Control Waveform Generator Fine Wavelength Control SBS Dither CPU Power Regulation LVTTL Control 14W Connector LVTTL RS232 Connector Signal Function Name Function Type Description DIS Disable Laser & ALS LVTTL 0=Optical output disable SRQ Service Request LVTTL 0=Service request MS Module I/O reset LVTTL 0 1 = Resets comms interface TXD RS232 transmit data LVTTL RS232 Rx RST Reset LVTTL 0=Module held in reset MFR1 No user connection Manufacturers connection only OIF Reserved LVTTL For future use DATA MZ data input Analogue GPPO (Male) DATAn MZ inverse data input Analogue GPPO (Male) BIAS MZ bias input Analogue 8 way connector BIASn MZ inverse bias input Analogue 8 way connector GND MZ ground Analogue 8 way connector PMON MZ power monitor Analogue 8 way connector 6

7 Mechanical Detail (dimensions in mm) 14 way Pin Connector designed to mate with Samtec P/N ASP or equivalent. Module attached with 4 X M2 screws. High resolution mechanical outline drawings and 3D.igs files can be provided on request. 7

8 14 Pin Connector pin out (J1) Name Function Active Description 1 3V3 2 DIS 3 3V3 4 SRQ 5 GND 6 MS 7 GND 8 TXD 9-5.2V 10 RXD V 12 RST 13 OIF 14 MFR1 8 Pin Connector pin out (J6) Name Function Active Description 1 MZ bias 1 NCD=DATA-BAR,ZCD=DATA 2 Reserved 3 Do not connect 4 Complimentary Power Monitor 5 MZ Gnd 6 Not used 7 MZ bias 2 NCD=DATA,ZCD=DATA-BAR 8 Not used RF Connectors pin out (J3, J4) Connector Type Name (TL7000Nxx) Name (TL7000Zxx) J4 GPPO-M MZ RF DATA_BAR MZ RF DATA J3 GPPO-M MZ RF DATA MZ RF DATA_BAR Note: Optical inversion of modulated output Nxx versus Zxx Data input defined as providing increased optical power for a positive direction of applied voltage. 1 J6 7 1 J J4 J3 8

9 Customer Support and Handling Recommendations A TTA evaluation kit is available which provides a hardware platform to test and characterize the Oclaro TTA. It provides convenient connection for TTA power supplies, LED power indicators and a selection of module enable/disable and software/hardware reset switches. This kit also includes a convenient GUI software applications interface which enables host/tta communications using the OIF MSA recommended packet structure via the RS232 interface, enabling comprehensive control and status interrogation. Please refer to your local sales representative for TTA evaluation kit availability. TTA product support documents are also available on request. The Oclaro applications document Handling and Operation Recommendations for the Oclaro Tunable Transmitter Assembly (TTA) D00081-AN, provides recommendations and advice regarding handling, mounting and operation of the TTA to enable straight forward integration of the TTA into a clients system card. Fibre Specification The TTA fibre pigtail incorporates a 9µm single mode fibre with a 900 µm secondary coating. The fibre pigtail optical interface characteristics are summarized in the table below. Property Notes Value / Description Units Fibre type 9µm single mode Length 1000+/-100 mm Outer secondary coating 900 typical diameter µm Jacket colour Blue Minimum bend radius 25 mm 9

10 RoHS Compliance Oclaro is fully committed to environment protection and sustainable development and has set in place a comprehensive program for removing polluting and hazardous substances from all of its products. The relevant evidence of RoHS compliance is held as part of our controlled documentation for each of our compliant products. RoHS compliance parts are available to order, please refer to the ordering information section for further details. Ordering Information: TL7000NCD-J57 (negatively chirped), TL7000ZCD-J57 (zero chirped) LC connector supplied as standard. Other connector types are available on request. -J59: MU -J28: SC -J34: FC/UPC Example: TL7000NCD-J57 is a negatively chirped modulator, C band tunable and LC optical connector. Evaluation Board available on request Patents Unpopulated Evaluation Board, part number: Populated evaluation board & TTA kit: EVTTA EVTL7000xxx-J57 This product is protected by US patent numbers 5,524,076 (neg chirp only), 6,345,135, 6,658,035, 6,654,400, 6,654,534, 6,687,278, 7,145,923, 7,394,838, 7,555,226, 7,680,374 and other patents and applications pending worldwide. Contact Information Important Notice Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by Oclaro before they become applicable to any particular order or contract. In accordance with the Oclaro policy of continuous improvement specifications may change without notice. The publication of information in this data sheet does not imply freedom from patent or other protective rights of Oclaro or others. Further details are available from any Oclaro sales representative. DANGER INVISIBLE LASER RADIATION AVOID DIRECT EXPOSURE TO BEAM MAX POWER 5.25 mw / +7.2dBm WAVELENGTH > 1525 nm CLASS IIIb LASER PRODUCT THIS PRODUCT COMPLIES WITH 21CFR INVISIBLE LASER RADIATION AVOID EXPOSURE TO BEAM CLASS 1M LASER PRODUCT Maximum Power 5.25 mw / +7.2dBm Wavelength nm REFERENCE IEC Edition 2.0 D00144-PB Issue 05 February 2011 Oclaro Oclaro the Oclaro, Inc. logo, and all other Oclaro, Inc p names and slogans are trademarks or registered trademarks of Oclaro, U.S.A. or other countries. Information in this datasheet is subject to chan notice. 10