An efficient and tunable 176-550 nm source based on the emission of resonant dispersive radiation from ultrafast solitons at 800 is demonstrated in a gas-filled hollow-core photonic crystal fiber (PCF). By careful optimization appropriate choice gas, informed by detailed numerical simulations, we show that bright, high quality, localized bands UV light (relative widths few percent) can be generated all wavelengths across this range. Pulse energies more than 75 nJ deep-UV, with relative...

We report on the generation of a three-octave-wide supercontinuum extending from vacuum ultraviolet (VUV) to near-infrared, spanning at least 113 1000 nm (i.e., 11 1.2 eV), in He-filled hollow-core kagome-style photonic crystal fiber. Numerical simulations confirm that main mechanism is novel and previously undiscovered interaction between dispersive-wave emission plasma-induced blueshifted soliton recompression around fiber zero dispersion frequency. The VUV part supercontinuum, which...

The demand for and usage of broadband coherent mid-infrared sources, such as those provided by synchrotron facilities, are growing. Since most organic molecules exhibit characteristic vibrational modes in the wavelength range between 500 4000 cm-1, sources enable micro- or even nano-spectroscopic applications at below diffraction limit with a high signal-to-noise ratio1, 2, 3. These techniques have been applied diverse fields ranging from life sciences, material analysis, time-resolved...

Abstract Tailoring the electric-field waveform of ultrashort light pulses forms basis for controlling nonlinear optical phenomena on their genuine, attosecond timescale. Here we extend control from visible and near-infrared—where it was previously demonstrated—to mid-infrared spectral range. Our approach yields single-cycle infrared over several octaves first time. Sub-10-fs a carrier-envelope-phase-stabilized, Kerr-lens-mode-locked, diode-pumped Cr:ZnS laser drive cascaded intrapulse...

We demonstrate temporal pulse compression in gas-filled kagomé hollow-core photonic crystal fiber (PCF) using two different approaches: fiber-mirror based on self-phase modulation under normal dispersion, and soliton effect self-compression anomalous dispersion with a decreasing pressure gradient. In the first, efficient to near-transform-limited pulses from 103 10.6 fs was achieved at output energies of 10.3 μJ. second, 24 6.8 6.6 μJ, also shapes. The results illustrate potential kagomé-PCF...

Compression of 250-fs, 1-μJ pulses from a KLM Yb:YAG thin-disk oscillator down to 9.1 fs is demonstrated. A kagomé-PCF with 36-μm core-diameter used pressure gradient 0 40 bar krypton. 22 achieved by 1200 fs2 group-delay-dispersion provided chirped mirrors. By coupling the output into second 25 argon, octave spanning spectral broadening via soliton-effect observed at 18-W average power. Self-compression measured, compressibility 5 predicted. Also strong emission in visible dispersive wave...

Abstract Continuous‐wave Tm:YAG and Ho:YAG thin‐disk lasers with maximum optical‐to‐optical efficiencies of 41% 58% respectively are presented. Pumped by a 780 nm laser diode, the generated output power 24 W. In comparison, laser, pumped fiber at 1908 nm, delivered 50 The reported powers are, to best our knowledge, highest among all emitting ≈2 μm, provide solid foundation for further development next‐generation 2 μm technologies.

Lasers based on Cr 2+ -doped II-VI material, often known as the Ti:Sapphire of mid-infrared, can directly provide few-cycle pulses with octave-spanning spectra, and serve efficient drivers for generating broadband mid-infrared radiation.It is expected that wider adoption this technology benefits from more compact cost-effective embodiments.Here, we report first diode-pumped, Kerr-lens mode-locked 2+doped oscillator pumped by a single InP diode, providing average powers over 500 mW pulse...

A myriad of existing and emerging applications could benefit from coherent broadband mid-infrared (MIR) light. Yet, tabletop sources are often complex or sensitive to interferometric optical misalignment. Here we demonstrate a significantly simplified scheme MIR generation by cascading the intra-pulse difference-frequency process in specific nonlinear crystal. This allows pulses generated directly mode-locked lasers be used without further temporal compression. The system, together with...

Dual-comb spectroscopy (DCS) normally operates with two independent, relatively low power and actively synchronized laser sources. This hinders the wide adoption for practical implementations frequency conversion into deep UV VUV spectral ranges. Here, we report a fully passive, high dual-comb based on thin-disk technology its application to direct comb spectroscopy. The peak (1.2 MW) average (15 W) of our Yb:YAG system are more than one-order-of-magnitude higher in any previous systems....

Ultrafast laser oscillators are indispensable tools for diverse applications in scientific research and industry. When the phases of longitudinal cavity modes locked, pulses as short a few femtoseconds can be generated. As most high-power based on narrow-bandwidth materials, achievable duration output is usually limited. Here, we present distributed Kerr lens mode-locked Yb:YAG thin-disk oscillator which generates sub-50 fs with spectral widths far broader than emission bandwidth gain medium...

Femtosecond light sources in the 3-5 μm region are highly sought after for numerous applications. While they can be generated by using nonlinear effects optical fibers, efficiencies and effectiveness of frequency conversion significantly enhanced ultrashort driving pulses. Here, we report on a few-cycle Cr:ZnS oscillator low-order soliton dynamics soft-glass fibers. By selecting appropriate parameters, sub-two-cycle pulses or broad supercontinua spanning over 1.7 octaves from 1.6 to 5.1 at...

We present a mid-infrared (MIR) source based on intra-pulse difference-frequency generation under the random quasi-phase-matching condition. The scheme enables use of non-birefringent materials whose crystal orientations are not perfectly and periodically poled, widening choice media for nonlinear frequency conversion. With 2 μm driving Ho:YAG thin-disk laser, together with polycrystalline ZnSe element, an octave-spanning MIR continuum (2.7-20 μm) was generated. At over 20 mW, average power...

Abstract We present a source of brilliant mid-infrared radiation, seamlessly covering the wavelength range between 1.33 and 18 μ m (7500–555 cm −1 ) with three channels, employing broadband nonlinear conversion processes driven by output thulium-fiber laser system. The high-average-power femtosecond frontend delivers 50 MHz train 250 fs pulses spectrally centered at 1.96 m. parallel channels employ soliton self-compression in fused-silica fiber, supercontinuum generation ZBLAN...

We demonstrate for the first time generation of octave-spanning mid-infrared using a BGSe nonlinear crystal. A Cr:ZnS laser system delivering 28-fs pulses at central wavelength 2.4 µm is used as pump source, which drives intra-pulse difference frequency inside As result, coherent broadband continuum spanning from 6 to 18 has been obtained. It shows that crystal promising material broadband, few-cycle via down conversion with femtosecond sources.

The proliferation of hyperscale data centers, as well edge and 5G infrastructure build-outs, requires SerDes running at different rates, over insertion losses, in environments. This work presents a scalable ADC/DSP-based transceiver architecture that runs from 1.25Gb/s NRZ to 56Gb/s PAM-4 16nm, supporting channels very short reach (VSR) 10dB long (LR) above 35dB. A follow-on design supports 112Gb/s 7nm, its measured results are also presented this paper. Some the key architectural features...

Thin-disk technology uniquely enables the simultaneous scaling of both average and peak powers, while maintaining an excellent beam profile. It has been widely adopted in 1-μm region, not only for continuous wave lasers but also pulsed oscillators amplifiers. However, development 2-μm thin-disk is still at a very early stage, with passive mode locking having demonstrated recently. Here, we describe detail new femtosecond Ho:YAG oscillator recent power-scaling experiments that resulted power...

We present an all-fiber high average power fiber optical parametric oscillator based on standard telecommunications dispersion-shifted fiber. The output of the is continuously tunable out to ±28 THz from pump wavelength. oscillator's in excess 1.9 W each sideband ±25 detuning. Between 5 and 14 detuning, Stokes 3.8 W.

A technique for optically accessing ultra-high vacuum environments, via a photonic-crystal fiber with long small hollow core, is described. The core and the bore enable pressure ratio of over 108 to be maintained between two while permitting efficient unimpeded delivery light, including ultrashort optical pulses. This can either passive or encompass nonlinear processes such as pulse compression, deep UV generation, supercontinuum other useful phenomena.

We report a Kerr-lens mode-locked Cr:ZnS oscillator directly pumped by two laser diodes, providing 34 fs pulses with 800 mW average power at 2.4 pm. This low-noise affordable femtosecond facilitates numerous emerging mid-infrared applications.

Diode-pumped Cr:ZnS oscillators have emerged as precursors for single-cycle infrared pulse generation with excellent noise performance. Here we demonstrate a amplifier direct diode-pumping to boost the output of an ultrafast oscillator minimum added intensity noise. Seeded 0.66-W train at 50-MHz repetition rate and 2.4 µm center wavelength, provides over 2.2 W 35-fs pulses. Due low-noise performance laser pump diodes in relevant frequency range, achieves root mean square (RMS) level only...

We report the first mode-locked Ho:YAG thin-disk oscillator delivering 220 fs pulses at 20 W average power and 2090 nm central wavelength. The output parameters constitute highest of any around 2 μm.

A simplified scheme of broadband mid-infrared generation is presented, where the intra-pulse difference-frequency-generation (IDFG) process cascaded in a single pass. Driven by Cr:ZnS laser, system provides ultra-broadband coverage with femtosecond pulse durations.

Broadband coherent infrared radiation has numerous applications in chemical, biological and material science. In particular, the spectral region spanning 2-20 μιη is highly sought after for chemical identification [1]. Recently, intra-pulse difference-frequency generation based on 2 μm lasers emerged as a promising technique robustly generating broadband mid-infrared [2-5]. It can also provide few-cycle pulses [6] with intrinsic carrier-envelope phase stabilization-critical time domain...

For the first time to our knowledge, a dual-comb laser based on thin-disk technology and its application direct frequency comb spectroscopy are presented. The peak power (0.6 MW) average (12 W) of Yb:YAG system more than one-order-of-magnitude higher in any previous systems. scheme allows easy adjustment repetition difference during operation. A time-domain signal recorded over 10 {\mu}s without active stabilization was sufficient resolve individual lines after Fourier transformation....