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University of Zagreb

Zvonimir Sipus

Dubravko Ivan Babic

Tin Komljenovic

A connected optical waveguide structure comprises n four-port optical couplers, where n is greater than one; and n waveguide loops, each loop having a corresponding perimeter; wherein each of the n perimeters is different from each of the other n&#x2212;1 perimeters. In one embodiment, for any pair of the n loops, the ratio of the larger perimeter to the smaller perimeter is greater than five halves (5/2).

Optical-coupler based modulation-averaging structures for self-seeded colorless WDM-PON

A fiber-optic transmitter comprises a transmitter optical port, an optical circulator, a semiconductor optical amplifier, and a two-port modulation-averaging structure. The optical circulator has at least three ports, a first one of the three circulator ports being optically coupled to the transmitter optical port. The semiconductor optical amplifier has an input optical port, an output optical port, and an electrical input port. The two-port modulation-averaging structure is optically coupled between the input optical port and a third one of the three circulator ports.

Wavelength-reuse fiber-optic transmitters

An array reflector comprising a waveguide and a high reflectivity mirror is disclosed. The waveguide has an input end and a reflective end. The high reflectivity mirror is disposed at the reflective end. The array reflector also includes n&#x2212;1 mirrors arrayed along the length of the waveguide, wherein n is an integer greater than two.

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Zagreb, Croatia

Zvonimir Sipus