J. Medrano, A. Musa, and V. Gonzalez M. Shadaram Dual Stage Optical Label Switch Using Out-of-Band Wavelength and Code Properties April IEEE Region 5 Technical Conference University of Texas at El Paso University of Texas at San Antonio

Dual Stage Optical Label Switch lOptical Label Switching wIn the near future circuit switching will predominately be used to route data through optical networks. wA method of generating circuits in an optical network. wWavelength and code properties of signal serve as out-of-band labeling methodology. lPrevious Research wExtension of Multi-Protocol Lambda Switching (MP S). wWDM and OCDMA methodologies have been combined to generate links with combined data rates of up to 1.52 Tb/s

Optical Label Switching

Primary Function of DSOLS The primary function of the DSOLS is to map two dimensional input signal labels to the desired output signal labels. The primary function of the DSOLS is to map two dimensional input signal labels to the desired output signal labels.

Dual Stage Signal Mapping

Primary Switch Components lDSOLS is comprised of three primary components: wEncoding Module wDecoding Module wInterconnection Network lPrimary components can be combined to support multiple switch configurations.

Encoding Module Wavelength Channel

Decoding Module Wavelength Channel

DSOLS Switch Configuration

Multi-stage Optical Encoding l From the perspective of an encoded signal, each node in the network is an optical decoding and encoding stage. lA method of multi-stage optical encoding needed to be define for this application.

Multi-stage Optical Encoding lMulti-Stage Optical Code Division Multiple Access (MS-OCDMA) wEncoding sequence with near-ideal correlation properties. wAll-optical threshold device. lGain Clamped Semiconductor Optical Amplifiers (GCSOA) have be utilized to generate all-optical hard threshold devices.

MS-OCDMA Simulation Encoding SequenceDecoding Sequence User User

MS-OCDMA Simulation

Code 1Code 2 NoiseSignalNoiseSignal Average2.95E E E E-02 Std Dev2.71E E E E-04 BER6E-10 1E-08

Maximum Channel Capacity lAssuming maximum channel capacity of optical fiber is 30.5 Tb/s. lEach encoded channel has a bit rate of 10 Gb/s. lGiven a target BER of 10e-9. lThe maximum number of user K per wavelength is computed using a Gaussian approximation.

Summary lOptical wavelength and code properties are utilized to establish circuits in an all- optical network. lMS-OCDMA is demonstrated. lDSOLS architecture provides increased data capacity on each point-to-point link.