10 W injection-locked single-frequency continuous-wave titanium:sapphire laser

Abstract

High-power tunable lasers with good longitudinal and transverse modes are fundamental tools for exploring quantum physics. Here we report a high-power continuouswave injection-locked titanium:sapphire laser with a low-loss cavity configuration, where only a laser crystal was installed in the laser cavity. Although the transverse mode was affected by a thermal lens formed in the laser crystal, the focal length of the thermal lens could be shifted via the temperature of the laser crystal holder or the pump power. As a result, we found a condition that 10 W single-frequency oscillation with a good transverse mode and a slope efficiency of 51% were achieved.

Realization of a PT-symmetric microchip laser in the polarization space using nanostructured laser mirrors

“…Other methods have relied on two cavity resonators like master oscillator power amplifier (MOPA), which has a master oscillator emitting in a single mode at low power output, feeding into an amplifyer [3]. Self-injection locking can also improve the spectral purity of the laser [4,5]. Other methods have targeted spatial hole burning (SHB), which causes multimode emission in homogenously broadened gain media.…”

Influence of High-Intensity Pumping on Gain Medium Temperature Increase and Laser Mode Tunability in a Hemispherical Short Cavity

“…For hemispherical short-cavity CW Yb:YAG lasers, optical conversion efficiencies exceeding 75% for the incident pump power have also been achieved [15]. In addition, optical-to-optical conversion efficiencies exceeding 31% for the incident pump power have been achieved for T:sapphire lasers despite the use of commercially available high-loss Ti:sapphire crystals [16,17]. Using a theory that quantitatively reproduces the experimental results of Ti:sapphire lasers, it has been shown that even under conditions of a high intrinsic residual loss of 4%, an optical-to-optical conversion efficiency of 55.9%, approaching the quantum limit of Ti:sapphire lasers, can be achieved by using high-gain by high-intensity pumping [17].…”

Atom Interferometry with Rb Blue Transitions

“…As also shown in the Bragg-pulse interferometry experiment, higher laser power and larger detuning from resonance will be required to reach optimal working conditions. The laser power can be increased by adding an amplification stage on the infrared radiation before the second-harmonic generation or by injectionlocking schemes of Ti:sapphire lasers that have recently been demonstrated to produce several watts of infrared light with an excellent spatial profile [57]. We expect that such an upgrade will allow one to reduce the noise due to spontaneous emission and unravel the full potential of the presented interferometer scheme.…”