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We present the first experimental demonstration of a novel class of hybrid III–V on silicon microlasers. This new type of laser revolves around the concept of resonant mirrors: two silicon cavities, directly coupled to the III–V laser mesa, provide high, narrow band reflection over a short distance. This results in a device that measures only 55 µm by 2µm and shows single-mode laser emission with...
A hybrid silicon laser with an on-chip optical phased array for 1D beam steering across a 12° field of view is demonstrated. The device achieved 7 dB background suppression and 1.8° × 0.6° beam width.
We report on hybrid III–V on Silicon lasers with adiabatic coupling. Fabry-Pérot laser with 16mW output power, integrated racetrack laser and photodetector, as well as widely tunable laser with 45nm tuning range are presented.
A passive polarization mode convertor monolithically integrated within the cavity of a semiconductor laser is reported. A TE-to-TM conversion efficiency of more than 90% is obtained using compound back-to-back sub-wavelength air trenches
An electrically driven photonic-crystal nanocavity laser with a buried heterostructure exhibits a record low threshold current of 14 µA at 25°C. High-temperature operation up to 95°C is achieved by using the InGaAlAs-based multiple-quantum-well active region.
We experimentally and theoretically study coupled semiconductor ring lasers. We report on the destabilization of unidirectional operation for large coupling strengths and the appearance of a coupling-induced bidirectional state, both undesirable for optical memory operation.
Modeling results for lateral-longitudinal mode discrimination in longitudinally inhomogeneous finite-length waveguides of ridge lasers are presented, obtained by numerical solutions of the wave equation and calculations of the mode thresholds, predicting high-brightness single-mode output of wide stripes.
Adiabatically flared slab-coupled optical waveguide lasers (SCOWLs) at 1.06 µm wavelength have been studied, achieving a large fundamental mode and a 32% increase in COD power. Capabilities and limitations of the taper mechanism are discussed.
Using a 3.9µm driving laser focused into a high-pressure gas-filled waveguide, we generate bright, phase matched, fully spatially coherent high harmonic beams in the keV region for the first time.
The recent technical progress on the femtosecond petawatt Ti:sapphire laser are presented, which include the peak power (1.26PW) and temporal contrast (∼1011) enhancement. Further, the significant applications achieved from the petawatt laser facility are summarized.
Hybrid III–V/silicon lasers for short reach optical interconnect applications need to have a modest power dissipation and preferably also a small footprint. Furthermore they should be free of mode hops even under varying temperature conditions. In this paper a number of designs will be discussed that address this set of requirements.
A hybrid silicon colliding pulse mode-locked laser with an integrated passive waveguide section is shown. The laser operates at 18GHz with a 20dB RF bandwidth of 1.6MHz.
We present 1.3 µm InAs/GaAs quantum dot Fabry-Perot and photonic crystal nanocavity lasers on Si substrates fabricated by wafer bonding, with thresholds of 205 A/cm2 and 2 µW, respectively, the lowest of lasers on silicon.
A new photonics integrated circuit for the demultiplexing and amplification of coherent combs is designed and demonstrated. The circuit utilises injection locking as a technique to amplifiy and maintain coherence between optical lines. Coherence between the optical lines of the device is analysed.
Data are presented demonstrating, to our knowledge, the first monolithic chip integrating a semiconductor laser with a spontaneous light emitting diode optical pump that can also act as a heat pump. The light emitting diode operates in the voltage bias regime needed to generate a thermoelectrophotonic heat absorption. Under ideal operation the light emitting diode can efficiently optically pump the...
Optical dipole nano-antennas are passive devices needing light from external sources. In this work, highly efficient coupling of light from microdisk lasers into plasmonic nano-antennas by using nano-tapers is proposed.
As data rates increase, traditional electrical interconnects for chip-chip or intra-chip communication will be replaced by low-power optical interconnects. The photonic integrated circuit (PIC) forming such an interconnect should exhibit low loss and good signal integrity and be capable of high temperature operation. In this talk, we will present the design, fabrication, and characteristics of a PIC...
We study continuous-wave laser operation of a Cr:ZnSe:glass composite waveguide. Results show the influence of propagation losses on the power conversion efficiency, pumping range and the wavelength tunability of the laser.
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