Yb-doped glass microcavity laser operation in water

A ytterbium-doped silica microcavity laser demonstrates stable laser emission while completely submerged in water. To our knowledge, it is the first solid-state laser whose cavity mode interacts with water. The device generates more than 2 μW of output power. The laser performance is presented, and low-concentration biosensing is discussed as a potential application

Wavelength-independent coupler from fiber to an on-chip cavity, demonstrated over an 850nm span

A robust wide band (850 nm) fiber coupler to a whispering-gallery cavity with ultra-high quality factor is experimentally demonstrated. The device trades off ideality for broad-band, efficient input coupling. Output coupling efficiency can remain high enough for practical applications wherein pumping and power extraction must occur over very broad wavelength spans

On-Chip, Ultra-Low Threshold Yb Silica Laser

A novel Yb:SiO_2 fiber-coupled laser on a silicon chip was fabricated using a solution-gel process. We report a record-low pump threshold of 2 μW, and discuss the practical advantages of Yb microlasers

Wavelength-independent bent-fiber coupler to an ultra-high Q cavity demonstrated over 850 nm span

A bent tapered-fiber coupler is experimentally demonstrated to allow wavelength independent fiber-to-cavity coupling over an 850nm span; opening current technology of ultra-high Q cavities for applications spanning the UV to the IR band

2-kW Average Power CW Phase-Conjugate Solid-State Laser

We have demonstrated stable operation of a 2-kW Yb:YAG phase-conjugate master oscillator power amplifier (PC-MOPA) laser system with a loop phase-conjugate mirror (LPCM). This is the first demonstration of a continuous wave (CW)-input LPCM MOPA operating at a power greater than 1 kW with a nearly diffraction-limited output beam. The single-pass beam quality incident on the LPCM varied with the specific operating conditions, but it was typically ${sim}20$ times diffraction-limited (XDL). The measured beam quality with an MOPA output power of 1.65 kW was 1.3 XDL