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We observed 7.2 dB squeezing of continuous-wave light at 860 nm with a periodically-poled KTiOPO4 crystal in an optical parametric oscillator. The squeezing level was obtained as the LO phase was locked.
Stress-induced birefringence in a single-transverse-mode YAG laser is well compensated simply by having the end mirror one Rayleigh range away from the gain.
3D FDTD is used to study the effect of surface roughening on the emission of a point source embedded in GaAs with a mirror behind the dipole. Enhancement factors of 10 : 1 are observed.
We propose a free-space terminator and ultra-broad-band interferometry in the microwave to infrared domains. The device is based on a ldquocoherent black-bodyldquo effect using an extremely thin metallic layer in a ring (Sagnac) interferometer.
We demonstrate tunable semiconductor lasers based on three coupled photonic crystal sections, that allows up to 18 nm tuning range with a side-mode suppression ratio greater than 35 dB.
We demonstrate a dispersion-free split mirror interferometric autocorrelator suitable for measuring pulses with durations from hundreds of attoseconds to tens of femtoseconds and spectral content from the near-UV to near-IR.
850 nm AlGaAs-based VCSELs with sub-micron hole arrays on the top of the DBR mirror are presented. The VCSEL exhibits lower threshold current down to 0.5 mA with enhanced optical output power by surface plasmon resonance at the Ag/SiO2 interface consisting the sub-micron metal hole arrays.
We realized, for the first time, NOLM-type all optical switching with carbon nanotubes loaded planar waveguide. ~20% splitting ratio contrast has been achieved using just 1 cm-long carbon nanotubes loaded planar waveguide.
We report demonstration of an optical magnetic mirror achieved by nanostructuring a metal surface. In contrast to normal mirrors, it inflicts only small change to the phase of a reflected wave, offering intriguing applications.
We demonstrate a high quality optical cavity with a 30 micron mirror on a micromechanical resonator. An optical finesse of 2100 is measured via cavity ring-down. High mechanical quality of the resonator is also observed.
Optical characterization of a novel type of semiconductor microcavity based on a fully-buried, all-epitaxial design reveals many properties essential for a manufacturable technology. We demonstrate detailed mode-imaging, lasing, as well as a sizeable Purcell effect.
A dramatic enhancement of harmonics and the extension of cutoff were observed in a linearly polarized two-color laser field below 10 nm. The intense soft X-ray supercontinuum provides an alternative for the attosecond generation.
A Ti:Sa laser using a combination of negatively- and positively-chirped pulse amplification (NPCPA) is demonstrated. The method suppresses spectral narrowing typically appearing in CPA lasers thus supporting bandwidth much broader than a conventional CPA.
We present a new method based on multi-wave shearing interferometry to measure the relative phase between two independent beams separated by a physical gap. Experimental results show accuracy and sensitivity better than 50 nm.
We report on the development of a sub-mJ Ti:sapphire laser operating at 50 kHz. Downchirped-pulse amplification chain, including 2 amplifiers pumped by one green laser, allows the generation of multi-GW femtosecond laser pulses.
90% efficient large aperture tunable optical filters having very narrow spectral width and realized by the incoherent association of a volume Bragg grating and a Fabry-Perot etalon are described and demonstrated.
We have shown experimentally and theoretically that the phase control of all independent stimulated Brillouin scattering-phase conjugate mirrors (SBS-PCMs) can be achieved by self-generated density modulation without coupling the beams.
Using an anomalously dispersive microstructure fiber and two different saturable absorber mirrors at 1.06 mum, we demonstrate soliton-like 180-fs pulses in addition to 400-fs pulses with up to 0.1 nJ energy using only intra-fiber dispersion compensation.
A novel OFSK transmitter based on a phase modulator-embedded optical loop mirror is proposed and experimentally demonstrated, which offers data-rate transparency and continuous tuning of the wavelength spacing and can be used in label swapping.
Here we report on a tandem OPO consisting of a Type I PPKTP-OPO pumping a ZGP-OPO generating radiation in the mid-IR. The PPKTP-OPO uses a bulk Bragg grating to generate narrowband pump radiation at 2008 nm.
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