Publisher: USPTO, Patent number: US 9948061B2 An optical wavelength sweeping apparatus is disclosed. The optical wavelength sweeping apparatus includes a laser diode having an active region including a thickness of less than 1 µm, a cross-section of less than 7 µm2, and a ratio of active region volume to total laser diode volume of less than 1/300, and a pulse generator coupled to the laser diode. The pulse generator is configured and operable to provide a current drive pulse to the laser diode to selectively and rapidly heat the active region and immediate vicinity to provide a peak increase in temperature of 30° C. or more at an end of the current pulse and to perform a wavelength sweep of emitted optical radiation which is greater than 5 nm. Methods of driving a laser diode and optical systems are disclosed, as are other aspects. Patent covers signal interrogation solution for Fiber-Bragg gratings and Fabry-Perot sensors using fast wavelength sweeping of standard DFB laser diodes. This patent is basis for collaboration with Broadcom/Avago Ltd.
F.32 International patent
COBISS.SI-ID: 21691670In 2020 Denis Đonlagić accepted the role of a associated editor of the journal Journal of Lightwave Technology, namely in the field of optical sensors and optical fibers. Journal of lightwave technology is one of the highest ranked high impact journals (4.1), (published 24x per year) and is sponsored by both IEEE (Institute of Electrical and Electronics Engineers) and OSA (Optical Society of America).
C.04 Editorial board of an international magazine
COBISS.SI-ID: 9841669In 2019, Denis Đonlagić became a member of the editorial board of Sensors journal, which provides an advanced forum for the science and technology of sensors. The journal boasts a high impact factor (3.0) and is published 24x per year.
C.06 Editorial board membership
COBISS.SI-ID: 10176278In 2015 Denis Đonlagić accepted the role of a sectoral editor of the journal Applied Optics, namely in the field of optical sensors and optical fibers. Applied Optics is one of the major journals in the field of optics (published 36x per year) and published by the OSA (Optical Society of America). It is the leading scientific journal in the field of applied optics and photonics with more than 50 years of tradition.
C.04 Editorial board of an international magazine
COBISS.SI-ID: 35949061This contribution presents a novel low-cost approach to interrogation of short cavity Fabry-Perot optical fiber sensors and their use for pressure measurements in a combustion chamber of a petrol or diesel engine. The optical fiber sensor interrogation system is based on laser diodes with different wavelengths. Reflectance from Fabry-Perot sensors at three different wavelengths was observed to determine the cavity length, using specially developed signal processing algorithms. The interrogation system was evaluated statically and dynamically. It is shown that the interrogation system has a resolution of about 2 nm and bandwidth of 16 kHz. Two sensor designs were studied and evaluated in both the laboratory environment and in a combustion chamber of the engine. Both sensor designs are executed on the tip of the optical fiber, with etching, cleaving and splicing of special optical fibers.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 22393366