Cgp Chretien Herben

A compact integrated InP-based single-phasar optical crossconnect

The first integrated InP-based polarization independent optical crossconnect is reported. The device can crossconnect signals at four wavelengths independently from two input fibers to two output fibers. Total on-chip loss is less then 16 dB. Device size is 7/spl times/9 mm/sup 2/.

Minimization of the loss of intersecting waveguides in InP-based photonic integrated circuits

Waveguide intersections contribute significantly to the total loss of complex photonic integrated circuits. A systematic theoretical and experimental investigation into the loss of waveguide intersections in InP-based waveguides is presented, including an approach for minimizing intersection loss. Extremely low loss below 20 mdB per intersection is demonstrated experimentally.

Chirping of an MMI-PHASAR demultiplexer for application in multiwavelength lasers

We report the first chirped multimode interference-based phased-array (MMI-PHASAR) for application in multi-wavelength lasers (MWLs). To avoid wavelength ambiguity in MWLs, undesired orders are suppressed by chirping the array of arms in the demultiplexer. Simulations show that a suppression of adjacent orders of more than 2 dB can be achieved. A 1/spl times/5 MMI-PHASAR has been realized in which the effect of the chirping is clearly visible according to the simulations.

Experimental assessment of the reflection of passive multimode interference couplers

Integration of semiconductor amplifiers in integrated optical circuits is presently possible. Reflections inside these circuits are undesirable for they can cause unwanted oscillations. The reflection properties of integrated passive multimode interference (MMI)-couplers have been experimentally determined.

Compact integrated polarisation-independent optical crossconnect

An extremely compact integrated polarisation independent optical crossconnect is reported. The device can crossconnect signals at four wavelength independently from two input fibres to two output fibres. Total on-chip loss is less than 16 dB, crosstalk is better than -16 dB. Device size is 6/spl times/6 mm/sup 2/. An improvement in performance compared to an earlier reported device has been achieved by using an optimised concept.

Ultra-compact polarisation independent phasar demultiplexer

An ultra-compact polarisation independent 8/spl times/8 PHASAR demultiplexer is presented. Device size is 650/spl times/750 /spl mu/m/sup 2/. The waveguide structure in which it has been realised is suitable for integration with electro-optical switches for application in integrated OXCs, on-chip losses are less than 7 dB and crosstalk is better than -17 dB.