The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Fully-stabilized optical frequency combs from modelocked lasers are a key component in various applications like optical frequency metrology, optical clocks or ultra-stable microwave generation. The traditional approach to stabilize the carrier-envelope offset (CEO) frequency /ceo in a diode-pumped modelocked laser is via a modulation of the pump current, i.e., by modulating the gain of the modelocked...
Silicon nitride microresonators provide a potentially CMOS-compatible platform for optical frequency comb generation [1]. As in any high-Q microcavity, thermal effects strongly affect the dynamics. This is particularly true considering that typical continuous wave pump powers for microresonator comb generation operate in the 20–35 dBm range. Temporal bright solitons for instance are generated when...
High repetition rate femtosecond lasers able to deliver pulse energies ranging from few hundred microjoules to the millijoule level is a very active and competitive field in laser research. In laser bulk technology, major improvements toward high average power were (i) the reduction of the pump heat load through Yb-doped crystals development and (ii) the availability of low cost and bright diode-laser...
Frequency combs provide a set of equidistant laser lines and find applications in many areas [1]. Microresonator based Kerr frequency combs are a recent scheme for frequency comb generation promising chip-level integration and novel applications such as coherent terabit telecommunications [2, 3]. The underlying principle is nonlinear frequency conversion of a continuous wave pump laser in a high finesse...
Photoacoustic imaging and optical coherence tomography (OCT) are the fastest growing fields in biomedical imaging. Supercontinuum (SC) sources offer great advantages to both of these modalities however, currently no suitable source has been developed to answer the requirements for both multispectral photoacoustic microscopy (MPAM) and OCT, i.e. a SC source with more than 50 nJ per bandwidth of less...
Up to date, the majority of the existing petawatt class lasers are based on Ti: Sapphire (Ti:Sa) because of the wide emission spectrum, high thermal conductivity and loose requirement of the pump laser parameters [1]. However, petawatt systems with pulse duration considerably less than 25 fs are not yet available due to the gain narrowing effect which limits the achievable bandwidth [2]. The most...
Tm doped materials are very attractive for highly efficient high power short pulse lasers in the wavelength range of two micrometer due to their broad gain bandwidths and the two-for-one pumping process with high power 800 nm laser diodes (LD). Among them, Tm doped sesquioxides (Tm:Re2O3, Re=Sc, Lu or Y) are among the most promising gain materials as they possess superior thermal and mechanical properties...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.