Polarization based filtering in a wavelength converter

A new scheme is demonstrated to filter signals after a wavelength converter based on integrated polarization components. This allows polarization independent conversion, co-propagating operation without a tuneable filter, and it facilitates conversion to the same wavelength

Polarization based filtering in a wavelength converter

A new scheme is demonstrated to filter signals after a wavelength converter based on integrated polarization components. This allows polarization independent conversion, co-propagating operation without a tuneable filter, and it facilitates conversion to the same wavelength

Polarization converter post-processing for integrated polarization independent SOA

Post-processing of a polarization converter (PC) in an experimental industrial generic foundry process is demonstrated. Insertion of the PC halfway an SOA reduced its polarization dependence from 14 dB to 3 dB

Design of an optical nanoantenna with focusing subwavelength grating couplers and metallic reflector

In the development of integrated large-scale optical phase array, compact optical nanoantennas are needed. For high resolution arrays, the nanoantenna footprint and the separation between them should be as small as possible to reduce the number of interference orders in the far field [1]. In the development of this nanoantennas in our InP membrane on Silicon (IMOS) platform [2], we use deeply etch focusing grating to reduce the size [3]. In order to increase the optical power emitting up, we add a metal reflector of Silver underneath the semiconductor with a small buffer of 50 nm of 푆푖푂2. This metal layer will also works as a thermal heater, which will change the optical properties of the semiconductor changing the direction of the upcoming light. The last element to be add is a subwavelength ridge which reduces the unwanted Fresnel reflections by reducing the refractive index contrast [3]