Broad area laser diodes are attractive for the high optical power they can produce. Unfortunately, this normally comes at cost of severely reduced spatial coherence since wide diode wave-guide is inherently spatially multi-mode along slow axis. We demonstrate a method to significantly improve high-power broad-area by placing it in an external cavity that mode selective. design cavity, such aperture acts as its own filter, obviating need intra-cavity slit-filter, and optimally utilizing...

Passive mode-locking critically relies on a saturable loss mechanism to form ultrashort pulses. However, in Kerr-lens (KLM), no actual absorption takes place, but rather losses appear due diffraction, and light must escape the cavity. The effect works generate through diffraction an effective instantaneous absorber that delicately depends interplay between spatial temporal profiles of pulse. Despite importance KLM as technique for generating ultrafast pulses fundamental role its operation,...

Kerr lens mode locking strongly depends upon intensity. Low pulse intensity weakens the nonlinear lens, and eventually is not supported. We demonstrate efficient mode-locking in a Ti:Sapphire laser oscillator with record-low intra-cavity (18 GW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) average power (340 mW). Using an additional window cavity, nonlinearity can be enhanced by order of magnitude compared to standard allowing...

The visibility of nonlinear SU(1,1) interference directly reflects the nonclassical properties entangled bi-photons and squeezed light with practically unlimited bandwidth, high efficiency ultra-high photon flux, orders magnitude beyond abilities standard photo-detectors. We study experimentally dependence on phase matching conditions beam parameters in a free-space configuration, show that maximal requires extreme collinear conditions, which deviate from for conversion. demonstrate...

Kerr-lens mode-locking (KLM) is the work-horse mechanism for generation of ultrashort pulses, where a non-linear lens forms an effective ultrafast saturable absorber within laser cavity. According to standard theory, pulse in cavity soliton, with temporal profile and power determined by non-linearity exactly counteract diffraction dispersion, resulting whose shape are fixed across wide range pump powers. We show numerically demonstrate experimentally that non-local effect Kerr linear allows...

We present a complete numerical analysis and simulation of the full spatio-temporal dynamics Kerr-lens mode-locking in laser. This dynamic, which is workhorse mechanism for generating ultrashort pulses, relies on intricate coupling between spatial nonlinear propagation temporal compression. Our tool emulates dynamical evolution optical field cavity all time-scales: fast time scale pulse envelope within single round trip, slow time-scale round-trips. employ ABCD formalism that fully handles...

We present a mode-locked semiconductor laser oscillator that emits few picosecond pulses (5-8ps at 379MHz repetition) with record peak power (112W) and pulse energy (0.5nJ) directly out of the (with no amplifier). To achieve this high performance we employ high-current broad-area, spatially multi-mode diode amplifier (0.3x5mm), placed in an external cavity enforces oscillation single spatial mode. Consequently, brightness beam is near-ideal ($M^2 = 1.3$). Mode locking achieved by dividing...

We present a mode-locked semiconductor laser oscillator that emits few picosecond pulses (5-8ps at repetition rate of 379MHz and wavelength 1064nm) with record peak power (112W) pulse energy (0.5nJ) directly out the (with no amplifier). To achieve this high performance we employ high-current broad-area, spatially multi-mode diode amplifier (0.3×5mm), placed in an external cavity enforces oscillation single spatial mode. Consequently, brightness beam is near-ideal (M2 = 1.3). Mode locking...

High repetition rate mode-locked lasers (in the GHz range), are desired for frequency comb spectroscopy. A major obstacle that currently impedes high mode-locking is inevitable subsequent reduction of single pulse energy, which reduces efficiency nonlinear Kerr effect in cavity, eventually precluding mode-locking. The standard methods to overcome this restriction try maintain intra-cavity peak intensity spite by tightening focus beam on crystal, or enhancing output coupler reflectivity and...

Abstract Dissipative solitons are fundamental wave-pulses that preserve their form in the presence of periodic loss and gain. The canonical realization dissipative is Kerr-lens mode locking (KLM) lasers, which delicately balance nonlinear linear propagation both time space to generate ultrashort optical pulses. This linear-nonlinear dictates a unique pulse energy, cannot be increased (say by elevated pumping), indicating excess energy expected radiated dispersive or diffractive waves. Here...

Broad area laser diodes are attractive for the high optical power they can produce. Unfortunately, this normally comes at cost of severely reduced spatial coherence since wide semiconductor wave-guide is inherently spatially multi-mode (in slow axis). We demonstrate a method to majorly improve high-power broad-area diode by placing it in an external cavity that mode selective. design cavity, such aperture acts as its own filter, obviating need intra-cavity slit-filter, and optimally...

Abstract Dissipative solitons are fundamental wave-pulses that preserve their form in the presence of periodic loss and gain. The canonical realization dissipative is Kerr-lens mode locking lasers, which delicately balance nonlinear linear propagation both time space to generate ultrashort optical pulses. This linear-nonlinear dictates a unique pulse energy, cannot be increased (say by elevated pumping), indicating excess energy expected radiated dispersive or diffractive waves. Here we show...

We demonstrate experimentally symmetry breaking in a linear cavity mode-locking laser due to non-local Kerr-lens, which is expressed deviation from the soliton model. The effect backed by numerical simulation with quantitative agreement.

We present a complete numerical analysis and simulation of the full spatio-temporal dynamics Kerr-lens mode-locking (KLM) in laser on all time-scales. The KLM dynamics, which is workhorse mechanism for generating ultrashort pulses, relies intricate coupling between spatial nonlinear evolution due to self focusing temporal compression self-phase modulation (SPM) dispersion. Our tool emulates dynamical optical field cavity time scales: fast scale pulse envelope within single round trip, slow...

SU(1,1) interference is a major tool for quantum detection of squeezed light. We optimize the visibility experimentally based on phase matching and beam parameters. demonstrate near-ideal (loss-limited) over an octave bandwidth.

Dissipative solitons are fundamental wave-pulses that preserve their form in the presence of periodic loss and gain. The canonical realization dissipative is Kerr-lens mode locking lasers, which delicately balance nonlinear linear propagation both time space to generate ultrashort optical pulses. This linear-nonlinear dictates a unique pulse energy, cannot be increased (say by elevated pumping), indicating excess energy expected radiated dispersive or diffractive waves. Here we show...