tunable filter datasheet - Sercalo

MEMSTUNABLEOPTICALFILTERWith Control BoardOVERVIEW’s Tunable Optical Filter is based on MEMStechnology and is designed for ITU C and L band with aFWHM bandwidth of 0.6 nm. It can be independentlycontrolled by an UART interface or an I2C/SMBusserial bus and features a user-programmable channelgrid.The highly reliable tuning mechanism uses anintegrated micro-mirror with switching time below 50 msand insertion loss below 3 dB.The component is designed to conform to Telcordia1221 reliability standards.FEATURES• 37 x 20 x 10 mm 3 size• User-programmable channelgrid• UART and I 2 C/SMBusinterfaceAPPLICATIONS• Reconfigurable Optical Add/Drop Multiplexers• Optical power monitors• Optical sensor interrogators• Low cost spectrometer• Low cost tunable laserContact:Sercalo Microtechnology Ltd.Landstrasse 1519494 SchaanPrincipality of LiechtensteinTel. +423 237 57 97 Fax. +423 237 57 48www.sercalo.com e-mail: info@sercalo.com

DESCRIPTIONThe tunable Filter is composed of an optical system and an electrical driver interface with asize of only 37x20x10 mm 3 . The device operating principle is depicted in Figure 2. Lightfrom the input fiber is collimated onto a fused silica grating. The grating diffracts theincoming light into its spectrum with a distinct angle for each wavelength. A MEMS mirrorreflects the light onto the output collimator, which only couples a small fraction of thespectrum into the output fiber. By modifying the mirror tilt angle user can chose thewavelength of the filter.TECHNICAL SPECIFICATIONSUnit Min Typ MaxOptical FilterTuning range (span) nm 80Central wavelength 1575Insertion loss dB 2.0 3.0Bandwidth @ 0.5 dB nm 0.25Bandwidth @ 3 dB nm 0.6Bandwidth @ 20 dB nm 1.6Return loss dB 30Wavelength repeatability nm 0.01Wavelength temperature dependence pm/K 1 5Switching time ms 10 50PDL dB 0.3Durability cycles No wearSide Mode Suppression Ratio (SMSR) dB 25Integrated DriverSupply voltage (Vdd) V 4.75 5 5.25Power consumption (idle) W 0.2Power consumption (operating) W 1UART speed baud 9600 115200SMBus/I 2 C bus speed kHz 400Logic level low V 0 0.3Logic level high V 3.0 5PackageOperation temperature °C 0 70Storage temperature °C -40 70Size (including control board) mm 37 x 20 x 10Size (only optical engine) mm 16 x 11.2 x 9.2Weight g 75ORDERING INFORMATIONTF 1 C 100 9 N PNumber ofindependentChannels:1 = 1 (2 fibers)Tuning range:C = 1530-1569 nmL = 1570-1612 nmC+L = 1525-1625 nmBandwidthFWHM:100 = 0.6 nmFiber Type:9 = single mode(SMF28)Fiber sleeve type:N = loose tube 0.9mmB = bare fibre 0.25mmElectrical Connector:P = bottom side pinsL = lateral connectorInformation in this datasheet is believed to be correct but Sercalo reserves the right to change specifications without notice at any time. [90-1143-3]

CONNECTOR PINOUTPinDescriptionnumber1 Ground (GND)2 Supply voltage (V DD )3 Reserved 14 UART TX data5 Reserved 16 UART RX data7 System reset (/RST)8 SMBus/I 2 C SDA9 SMBus/I 2 C SCL10 Ground (GND)1 Let reserved pins unconnected.Figure 1 – Device layout (dimensions are in millimeters)Information in this datasheet is believed to be correct but Sercalo reserves the right to change specifications without notice at any time. [90-1143-3]

FIBERIN/OUTOPTICALSYSTEM4DACDC/DCCONVERTERV DDGNDRxDTxDMICROCONTROLLERUARTSERIAL PORTTEMPERATURESENSORFigure 2 – Functional block diagramINPUT FIBERGRATINGOUTPUT FIBERMEMS MIRRORFigure 3 – Tunable filter operating principleInformation in this datasheet is believed to be correct but Sercalo reserves the right to change specifications without notice at any time. [90-1143-3]

0-5Insertion loss [dB]-10-15-20-25-30-35191 191.5 192 192.5 193 193.5 194 194.5 195Frequency [THz]Figure 4 – 100GHz spacing, 32 channels0Insertion loss [dB]-5-10-15-20-25-300.6 nm@ 3dBm1.6 nm@ 20dBm-35-401556 1558 1560 1562 1564 1566 1568 1570Wavelength [nm]Figure 5 – Typical filter shapeInformation in this datasheet is believed to be correct but Sercalo reserves the right to change specifications without notice at any time. [90-1143-3]