Gérard Mourou

Gérard Mourou awarded Physics Nobel Prize 2018

Born in 1944 in Albertville in the French Alps, student at Grenoble University, Gérard Mourou is a scientist and pioneer in the field of electrical engineering and lasers. After receiving the prestigious French Legion of Honour award in 2012, the Frederic Ives medal in 2016 from the Optical Society of America, and the Arthur L. Schawlow award in Laser Science from the American Physical Society, he was awarded a Nobel Prize in Physics in October 2018, along with his student Donna Strickland, for the invention of chirped pulse…


How is spectral purity of a laser assessed?

Spectral purity expresses the degree of monochromaticity of a radiation, and has been early identified as one of the main remarkable characteristics of lasers even before the experimental demonstration of the first laser source. However, since no generic standard definition is available, complementary aspects have to be considered in order to assess spectral purity of a laser, mostly depending on the approach and on the application aimed with a laser set-up. Linewidth is probably the most usual way of quantifying…


Frequency Comb characterization with High-Resolution Fourier Transform Spectroscopy (FTS)

– Explanation and applications of Frequency Combs – Frequency combs are very precise light sources which can be used for the measurement of absolute optical frequencies, so they can serve as an optical clockwork for precision spectroscopy, optical sensing, distance measurements, laser noise characterization, telecommunications, and in fundamental physics. The spectrum of an optical frequency comb consists of a train of equidistant lines, i.e. it has equidistant optical frequency components, while the intensity of the comb lines can vary substantially…

Frontiers in Optics l Laser Science

As we look forward to the next 100 years of innovation, Frontiers in Optics returns to Rochester, the birthplace of The Optical Society. FiO 2016—the 100th OSA Annual Meeting—and the 32nd Annual Meeting of the APS Division of Laser Science unite the OSA and American Physical Society (APS) communities for five days of quality, cutting-edge presentations, fascinating invited speakers and a variety of special events. The FiO Exhibit  hosts more than 60 participating companies and industry leaders.

Laser Optics 2016

The Laser Optics Conference is the traditional international event organized in the field of laser physics, quantum electronics, photonics, and optical engineering. The conference will take place June 27 – July 1, 2016 in St. Petersburg, Russia. The LO’2016 technical program includes selected topic symposia, plenary, parallel and poster sessions over five days. Distinguished plenary and invited speakers will present the state-of-the-art of laser physics, photonics and optical engineering.



CLEO (Conference on Lasers and Electro-Optics) serves as the premier international forum for scientific and technical optics, uniting the fields of lasers and opto-electronics by bringing together all aspects of laser technology, from basic research to industry applications. Attendees have the opportunity to hear and present groundbreaking research, share ideas, and network with colleagues and luminaries. CLEO presents a world-renowned peer-reviewed program and offers high quality content from five core event elements: CLEO: QELS – Fundamental Science CLEO: Science & Innovations…

Practical case- Tunable DFB laser diode - header

Tuning a DFB laser diode with temperature

Distributed Feedback (DFB) lasers are commonly used as tunable lasers over a range of a few nanometers. This is generally achieved by adjusting the temperature of the chip, thanks to a driver that can also monitor the current flowing through the DFB. This is a straightforward way of obtaining a tunable laser for a narrow range, typically one or two nanometers. However, temperature tuning can lead to unexpected behaviors which can be critical in many applications. A distributed feedback (DFB)…


Units conversion for spectrum representation

Wavelength, Wavenumber, Frequency and Photon Energy Conversion                                    The x-axis of a spectrum should be scaled in frequencies (in Hertz). The frequency representation is dedicated to applications such as measurements of atomic and molecular transitions, heterodyne spectroscopy or TeraHertz generation. The optical frequencies are so large (from 400 to 750 TeraHertz in the visible range) that it is common to use wavelengths in micrometers…