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A method for thermal-stabilization of silicon microdisk resonators, based on thermooptic polymer coatings, is proposed. Two orders of magnitude improvement in thermal stability is expected. Effects on Q and major fabrication challenges are discussed.
An optofluidically tunable multimode interference (MMI) bandpass filter is demonstrated. This scheme allows for a tuning range of almost 40 nm, by simple changing the liquid refractive index around the multimode fiber of the filter.
A blazed grating is used for the separation of single photons from photon pairs. The Fraunhofer far field of the two-photon rate depends on the spatial correlation strength of the photons and enables correlation characterizations.
A frequency comb is phase-locked to a CW laser with an electro-optic-modulator providing 1.6 MHz feedback bandwidth. Residual phase noise is as low as -94 dBc/Hz, and the comb remained locked under mechanical vibration of up to 1.9 g.
We demonstrate for the first time an electronically processed Walsh Code with 16 chips at 18 Gchip/s. An auto-cross correlation ratio of 18.1 dB is achieved between two orthogonal codes after transmission over 10 km of SMF.
In this paper, cascading plasmonic gratings were investigated. The angle dependent reflection spectrum of the proposed structure displays a resonance peak at a specific angle. The FWHM of the resonant peak is smaller than 2deg. The angular dispersion of the cascading plasmonic gratings is about dthetas/dlambda=0.15deg/nm. The cascading plasmonic gratings can be used as a spatial filter which can improve...
We describe an optical network-on-chip built from passive wavelength routing circuits and tunable micro transmitters based on microdisk sources. Operation of the different subcomponents will be demonstrated.
We describe the use of a semiconductor optical amplifier as an intra cavity, continuous phase tuning element in an optoelectronic oscillator. A tuning range larger than 3 MHz is demonstrated in a 10 GHz oscillator.
We locked a laser to a cavity using an all-digital Pound-Drever-Hall feedback system. By performing the demodulation and feedback controller digitally the low frequency noise performance was improved compared to a conventional analog system.
Photon bunching in highly chaotic sources (true blackbody and amplified spontaneous emission) is detected for the first time with femtosecond temporal resolution by use of a Hanbury-Brown-Twiss experiment relying on two-photon absorption in semiconductors.
A low complexity DQPSK receiver based on frequency discriminator demodulator is demonstrated experimentally, showing 2 x enhanced tolerance to fiber chromatic dispersion, and 4-dB higher nonlinear threshold to Gordon-Mollenauer effect compared with conventional delay-interferometer based receiver.
A phase-locked 110-GHz continuously-tunable optical-single-frequency generator is developed based on a phase-stabilized fiber-based comb. Stability of the optical frequencies at 1s are 3.0 and 31times10-12 at scanning speeds of 0.17 and 1 GHz/s, respectively.
A quantum ghost imaging scheme is modified to discriminate between two spatially non-overlapping objects using a single pair of entangled photons. The ldquoghostrdquo image information is extracted by means of holographic filtering and coincidence detection.
We controlled the carrier-envelope phase (CEP) of a 5.5-fs, 2.7-mJ optical parametric chirped-pulse amplification system at a 1-kHz repetition rate, and observed clear CEP dependence of high harmonics.
We observe torsional phonons of quinquethiophene in the time-domain and exploit the coherence for controlling the photoluminescence yield. We use the pump-dump scheme with visible femtosecond pulses, detecting the time-integrated photoluminescence versus pump-dump delay.
We propose an all-optical differentiation scheme based on polarization coupling and filtering while perform it well at 12.5 Gb/s with error ~0.07, which is applicable to high-speed optical signal processing at 40 Gb/s and above.
Many free space quantum key distribution systems are restricted to operation at night. Implementing spectral, spatial and temporal filtering techniques, we were able to establish a secure key transmission over several days using entangled photons.
We report a gain-enhanced and spectral-narrowed optical parametric oscillator based on a monolithic PPLN integrating an optical parametric generator with two electro-optically active polarization-mode converters. Unique spectral manipulation of the OPO signal is also demonstrated.
We describe the fabrication and measurement of a terahertz filter based on porous silicon. The device is constructed by electrochemically etching silicon to produce a Bragg mirror comprised of alternating nanoporous silicon layers.
We report pulsed room temperature lasing from optically pumped subwavelength metal-insulator-semiconductor structures. The lasers consist of InGaAsP gain disks embedded in a SiO2/aluminum bi-layer. Lasing at 1520 nm from a 730 nm gain core is demonstrated.
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