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Stable and spectrally narrow laser sources referenced to ultrastable passive Fabry-Pérot cavities are invaluable for optical atomic clocks and they find important applications, e.g. in precision tests of relativity or novel radar applications. Ultimately the fractional frequency instability of the laser is limited by Brownian thermal noise of the cavity constituents.
We present a numerical study of the nonlinear dynamics of a population of coupled semiconductor lasers with saturable absorber operating in the excitable regime [1] and described by a set of coupled Yamada models [2]. In particular we have investigated the self-organized synchronization process taking place spontaneously among the lasers, showing significant correlations between the spike-like pulses...
High-power single-frequency lasers are very attractive for a wide range of applications such as nonlinear conversion, gravitational wave detection, atom trapping or LIDAR. Power scaling in single-frequency regime is a challenging domain of research. In fact, nonlinear effect such as stimulated Brillouin scattering (SBS) is the primary power limitation in single-frequency amplifiers. To mitigate SBS,...
Pulsed operation characteristics of a high-power 1550 nm tapered distributed Bragg Reflector (DBR) laser diode are described. The development targets applications such as LIDAR and range finding, which require eye-safe, coherent light sources with a high peak-power. In particular, we employ a regrowth-free technique and AlGaInAs/InP gain structure, and demonstrate a peak power of about 1.6 W (drive-current...
GaAs diode laser-based hybrid micro-integration technology meets the demand for precision spectroscopy applications in space for compact, robust, and energy-efficient laser modules. It supports applications at wavelengths ranging from 630 nm to 1200 nm and is already used for quantum optics experiments in space [1].
Dual-frequency (DF) solid-state lasers provide very interesting characteristics for application in Radar-Lidar, metrology or microwave photonics systems. Indeed, such lasers sustaining the oscillation of two cross-polarized modes with different frequencies provide stable and tunable optically carried microwave beat-notes [1, 2]. Nevertheless, solid-state DF lasers suffer from resonant excess intensity...
Recent advances on Ytterbium ultrafast lasers have led to compact and versatile systems with high average output power, potentially high pulse energy and easily tunable repetition rate. Such lasers are well suited for time-resolved pump-probe experiments, a field which involves a wide range of techniques spanning from X-rays diffraction imaging and spectroscopy to asynchronous optical sampling (ASOPS)...
Microwave signals of extreme spectral purity are of great interest in a large variety of applications ranging from deep-space navigation systems to synchronization of large scale facilities as well as pulse-Doppler radars and precision spectroscopy. Photonic microwave generation schemes, in which a mode-locked laser is synchronized to an ultra-stable laser reference, allow unparalleled levels of phase...
Large arm length imbalance fibre-based interferometers have shown great potential for laser frequency stabilization and control, with frequency noise power spectral density close to the 10−1 Hz/Hz1/2 level [1]. In order to understand the performance of such frequency stabilization systems, it is important to distinguish the intrinsic noise of the frequency reference, which is ultimately limited by...
A supercontinuum (SC) laser pulse, which is generated through third-order nonlinear process, is valuable light for various applications such as optical coherence tomography (OCT), and spectral measurement. Coherence of a SC pulse is one of the most important properties because the accuracy and sensitivity of these measurements are determined by its noise property. Recently, the second-order coherence...
Gravitational Wave (GW) is very small temporal variation of space distortion which is caused from the change of enormous mass such as inspiral and merger of black hole binaries, explosion of supernovae, and the inflation in the early universe. In order to detect GW directly, long-baseline laser interferometers have been developed by many countries and, at long last, the first direct detection of GW...
There is increasing demand for low noise, narrow linewidth lasers for applications including spectroscopy, ion traps for optical clocks and gravitational waves measurements. External cavity diode lasers (ECDL) can provide a compact, low cost solution; however these are typically available at a limited range of optical frequencies. The increase in applications requiring robust laser systems (e.g. space...
Due to the compact and robust design, modem fiber frequency combs are a very promising tool for future space-bome instruments such as optical clocks, LIDAR systems and intra-satellite links.
High intensity femtosecond lasers are now routinely used to produce energetic particles and photons via interaction with solid targets [1-2]. However, the relatively low conversion efficiency of such processes requires the use of high repetition rate laser to increase the average power of the laser-induced secondary sources [3]. Furthermore, for high intensity laser-matter interaction, a high temporal...
Thermally induced wavefront distortions have been a major limitation for the power scalability of high-brightness solid-state lasers. The concept of the thin-disk laser has led to significant improvement in this respect [1], enabling output powers in the multi-kW range both in multimode as well as in close to fundamental-mode operation [2, 3]. Even though significantly reduced in comparison to other...
Wavelength tuneable lasers for 40G and 100G coherent optical communications systems need to meet stringent requirements on narrow linewidth emission across the entire tuning range, with typical values of 300–500 kHz required in commercial systems. Higher capacities can be achieved in next generation systems by employing higher order modulation formats such as 16QAM or 64QAM. However, such systems...
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...
Laser linewidth broadening through phase modulation is an effective way of suppressing stimulated Brillouin scattering (SBS) [1]. However, several applications require laser linewidth to be as narrow as possible. These contradicting requirements call for phase modulation formats that allow for suppression of SBS while maintaining the laser power within a tolerable optical bandwidth. Previously, we...
Many different mode-locking techniques have been realized in the past [1, 2], but mainly focused on increasing the spectral bandwidth to achieve ultra-short coherent light pulses with well below picosecond duration. In contrast, no mode-locked laser scheme has managed to generate Fourier-limited nanosecond long pulses, which feature narrow spectral bandwidths (∼MHz regime) instrumental to applications...
We report on a commercial, industrial-grade, sub-200 fs Yb-doped oscillator at 1041.3 nm central wavelength with an output power of 152 mW at 71.4 MHz repetition rate. The compact laser oscillator combines ultra-low amplitude and time jitter noise and it is well suited for seeding high-energy Yb-based amplifier systems. This technology developed for optical clocks and extended to this wavelength range...
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