Agilent AFKC-xxxx Pluggable DWDM Transceiver for operation to 2.7 Gb/s Part of the Agilent METRAK family
Features· MSA Compliant (http://www.hotplugdwdm.org)· Low power dissipation <2 W typical· Controlled hot plugging· Mountable either through the front panel or directly on the host PCB· Integrated wavelength locker· Data rates from 155 Mb/s to 2.7 Gb/s (no internal data retiming)· Operation across C band on the 100 GHz ITU grid· Link optical power budget 33 dB minimum· Dispersion performance allows links to 160 km· Compliant with SONET OC-48/ SDH STM-16· Directly modulated, cooled, InGaAsP MQW DFB laser· High sensitivity APD based receiver· Automatic optical power control· Automatic wavelength control· Automatic internal APD bias generation and control· Received power monitor· AC-coupled CML compatible differential data input and output· Simplex LC optical connector receptacles· 70 way two-row electrical connector· Single +3.3 V power supply· Slow or fast TX_DISABLE
Description The MSA compliant transceivers are high performance, compact, cost effective modules for serial optical communications at data rates to 2.7 Gb/s. They are designed to provide SONET/SDH compliant links at 2.488 Gb/s. They are also compatible with other standard data rates such as GbE. The optical power and receiver sensitivity allow for an optical power budget 33 dB and the dispersion performance enables a range of link distances to 160 km. The full range of C band wavelengths is available on the ITU 100 GHz grid. The benefits include the most compact multisourced package style available, hot pluggability and integrated power, wavelength and APD bias control. Device monitoring is provided via a 2-wire serial interface. System monitoring is via a loss of signal alarm. The transmitter section contains a cooled DFB laser and wavelength locker and has IEC 825 Class 1M and CDRH Class 1 eye safety. The receiver section uses an APD receiver for excellent sensitivity across the whole of C band.
Connectors Optical Connector Simplex LC optical connector receptacles. Electrical Connector 70 way two-row connector.
Applications· DWDM optical interfaces to OC-48/STM-16 data rates with FEC· Optical transport platforms· Multi-service provisioning platform· Optical add/drop multiplexers· Optical switch and cross-connect· Metro core and access networks· Video Transport Systems
Functional Description A simplified schematic diagram of the transceiver is shown in Figure 1. The transmitter subassembly contains a directly modulated DFB, a wavelength locker, thermoelectric cooler (TEC), optical power monitor and thermistor. The microcontroller compares readings from the power monitor, wavelength locker and thermistor with factory-set values and corrects for any deviations over temperature and through life. Similarly, the bias voltage on the APD receiver is controlled to optimize datasheet performance.
Each transceiver can be individually addressed over the I2C bus (up to a limit of 8 per bus). The micro-controller can be interrogated and commands issued over the I2C bus (SDA and SCL lines). Alarms and Loss of Signal (LOS) are flagged by the appropriate pins (see Figure 4).
Package The package outline, pin out (Figures 2, 3 and 4) and rail system (AFKA-0001, AFKA0002) are compliant with the multisource agreement (www.hotplugdwdm.org). The rail system for front panel or inboard mounting provides connection to chassis ground for EMI purposes.
Tone In Slow Tx Disable Transmitter Sub-Assembly Laser Driver Tx Disable 2 Tx Data In
Module Enable Tx Alarm Micro Controller Rx Alarm 3 Add [2:0] SDA Bias SCL Tone Out Rx LOS APD Rx Post Amp 2 Rx Data Out
Module Base Centre vertical plane of module Back surface of module bezel, safety hard stop Top surface of customer's PCB Leading edge of module PCB Vertical face of module hard stop, hard stop on rail