photonics laboratory @ ucla
led by prof. bahram jalali
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Recent Press Coverage

UCLA Researchers Build World's Fastest Camera to Screen for Cancer

Ultrafast Camera Could Detect Wandering Cancer Cells

JAWS Filter Generates Sawtooth

Two Tools in One

The Real Sea Monsters

GigOptix's 100G Modulator

World's fastest camera

Debut for world's fastest camera

The freaky maths that led to ...
Click here for a complete list of press coverages.
Open Positions
Postdoc Available
We are looking for highly motivated postdoctoral scholars with excellent academic records. Applicable projects are primarily focused on ultrafast imaging for biomedical applciations. Interested candidates should send their CV to Dr. Mohammad H. Asghari. Please see additional details in the job description.
Research Opportunities
Exciting projects are available for postdocs, graduate, and undergraduate students. Postdocs and students with fellowships will be given priority. Interested candidates should read this page and e-mail a brief introduction and CV to Claire Chen.
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Welcome to Photonics Laboratory @ UCLA
The Photonics Laboratory at UCLA performs multi-disciplinary research and development in the fields of silicon photonics, microwave photonics, and biophotonics for biomedical and defense applications. The Lab has two complementary missions. The first is to solve critical problems faced by defense, commercial industries, and medicine through innovative approaches that enable revolutionary advances in devices or systems. The second and equally important mission is to produce creative and highly skilled scientists and engineers who will be the driving force for technological innovation in the 21st century.
News & Announcements
Nature photonics (January 2013): Dispersive Fourier transformation is an emerging measurement technique that overcomes the speed limitations of traditional optical instruments and enables fast continuous single-shot measurements in optical sensing, spectroscopy and imaging. Using chromatic dispersion, dispersive Fourier transformation maps the spectrum of an optical pulse to a temporal waveform whose intensity mimics the spectrum, thus allowing a single-pixel photodetector to capture the spectrum at a scan rate significantly beyond what is possible with conventional space-domain spectrometers. Over the past decade, this method has brought us a new class of real-time instruments the permit the capture of rare events such as optical rogue waves and rare cancer cells in blood, which would otherwise be missed using conventional instruments.
Nature photonics (January 2013): Stochastically driven nonlinear processes are responsible for spontaneous pattern formation and instabilities in numerous natural and artificial systems, including well-known examples such as sand ripples, cloud formations, water waves, animal pigmentation and heart rhythms. Technologically, a type of such self-amplification drives free-electron lasers and optical supercontinuum sources whose radiation qualities, however, suffer from the stochastic origins. Through time-resolved observations, we identify intrinsic properties of these fluctuations that are hidden in ensemble measurements. We acquire single-shot spectra of modulation instability produced by laser pulses in glass fibre at megahertz real-time capture rates. The temporally confined nature of the gain physically limits the number of amplified modes, which form an antibunched arrangement as identified from a statistical analysis of the data. These dynamics provide an example of pattern competition and interaction in confined nonlinear systems.
Our work about the high-throughput single-microparticle imaging flow analyzer has been published in PNAS online and covered in UCLA Newsroom and PNAS's Highlights. The technology can take a picture of every single cell in a microfluidic channel with a record high throughput of 100,000 cells/s and perform non-stop image-based cell classification in real time. It holds promise for a broad range of applications such as high-throughput screening, cancer detection, and stem cell research. The work has been highlighted in TIME Magazine and OPN.
Undergraduate researcher Nora Brackbill received National Science Foundation Graduate Fellowship and will attend Stanford University Ph.D. program in September 2013.
Undergraduate researcher Rebecca Brown got admitted to and will attend medical school in July 2013.
Postdoctoral scholar Keisuke Goda (2007-2012) appointed Full Professor at University of Tokyo.
Professor Bahram Jalali received the 2012 Aron Kressel Award from the IEEE photonics society.
Professor Bahram Jalali received The 2012 Distinguished Engineering Achievement Award from The Engineers' Council.
Ali Fard has won the 2011-2012 Electrical Engineering Department's Distinguished Ph.D. Dissertation Award in Physical & Wave Electronics.
Kam Yan Hon's paper titled " The Third-Order Nonlinear Optical Coefficients of Si, Ge, and Si(1-x)Ge(x) in the midwave and longwave infrared" has been selected to be on the cover of Journal of Applied Physics. Congratulations!

Using a combination of semiconductor theory and experimental results from the scientific literature, we have compiled and plotted the key third-order nonlinear optical coefficients of bulk crystalline Si and Ge as a function of wavelength (1.5-6.7 um for Si and 2.0-14.7 um for Ge).
Ali Fard wins SPIE Scholarship. This award recognizes his academic and research excellence in the field of optics and photonics. Congratulations!
Keisuke Goda wins Burroughs Welcome Fund Career Award at the Scientific Interface! The purpose of this award is to bridge advanced postdoctoral training and the first three years of faculty service. Congratulations!
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