187 citations · 707 across the 15 of their papers we have counts for
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Deep Inverse-Designed Nanophotonic Processors with Structural Nonlinearity from Repeated Phase Encoding
Azka Maula Iskandar Muda, Uğur Teğin
Passive nanophotonic scattering regions implement linear optical transformations, and cascading input-independent regions alone does not create functional depth because the resulti…
Resolution-Agnostic Lensless Imaging via Fourier Neural Operators
Kerem Ekec, Uğur Teğin
Lensless cameras based on thin diffusers offer a compact alternative to conventional refractive imaging but rely on computational reconstruction, since the diffuser's point spread…
Self-optimizing multichannel optical computing
Fatma Nur Kılınç, Uğur Teğin
Optical computing offers ultrafast, energy-efficient alternatives to conventional digital processors, yet most implementations remain confined to single-channel processing, severel…
Optical Spiking Neural Networks via Rogue-Wave Statistics
Bahadır Utku Kesgin, Gülsüm Yaren Durdu, Uğur Teğin
Optical computing could reduce the energy cost of artificial intelligence by leveraging the parallelism and propagation speed of light. However, implementing nonlinear activation,…
The role of modes in nonlinear fiber optical computing
Firdevs Yüce, Bora Çarpınlıoğlu, Uğur Teğin
We investigate the nonlinear propagation of light in graded-index multimode fiber, utilizing it as an optical computing unit, and quantify how it employs waveguide modes to process…
Fiber-based diffractive deep neural network
Bahadır Utku Kesgin, Firdevs Yüce, Uğur Teğin
Optical computing has reemerged as a promising alternative computing paradigm for providing energy-efficient information processing in the age of artificial intelligence. Among var…
Optical computing with supercontinuum generation in photonic crystal fibers
Azka Maula Iskandar Muda, Uğur Teğin
We introduce a novel photonic neural network using photonic crystal fibers, leveraging femtosecond pulse supercontinuum generation for optical computing. Investigating its efficacy…
Scalable Optical Learning Operator
Uğur Teğin, Mustafa Yıldırım, İlker Oğuz +2
Today's heavy machine learning tasks are fueled by large datasets. Computing is performed with power hungry processors whose performance is ultimately limited by the data transfer…
All-fiber spatiotemporally mode-locked laser with multimode fiber-based filtering
Uğur Teğin, Babak Rahmani, Eirini Kakkava +2
We demonstrate the first multimode fiber interference-based filtering in an all-fiber spatiotemporally mode-locked laser. The oscillator generates dissipative soliton pulses at 103…
Single mode output by controlling the spatiotemporal nonlinearities in mode-locked femtosecond multimode fiber lasers
Uğur Teğin, Babak Rahmani, Eirini Kakkava +2
The performance of fiber mode-locked lasers is limited due to the high nonlinearity induced by the spatial confinement of the single-mode fiber core. To massively increase the puls…
Spatiotemporal self-similar fiber laser
Uğur Teğin, Eirini Kakkava, Babak Rahmani +2
In this Letter, we demonstrate, to the best of our knowledge, the first spatiotemporally mode-locked fiber laser with self-similar pulse evolution. The multimode fiber oscillator g…
All-fiber all-normal-dispersion femtosecond laser with nonlinear multimodal interference based saturable absorber
Uğur Teğin, Bülend Ortaç
In this letter, we demonstrate the first all-fiber all-normal dispersion ytterbium-doped oscillator with nonlinear multimodal interference based saturable absorber capable to gener…
High power high repetition rate supercontinuum generation in graded-index multimode fibers
Uğur Teğin, Bülend Ortaç
Graded-index multimode fibers can handle high average powers and feature unique nonlinear dynamics due to spatio-temporal evolution of the light inside. We report on generation of…
Observation of Spatio-temporal Instability of Femtosecond Pulses in Normal Dispersion Multimode Graded-Index Fiber
Uğur Teğin, Bülend Ortaç
We study the spatio-temporal instability generated by a universal unstable attractor in normal dispersion graded-index multimode fiber (GRIN MMF) for femtosecond pulses. Our result…