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A 1 × 8 optical splitter on silicon-on-insulator technology is demonstrated with less than ±1.0 dB imbalance for a wavelength range of 300 nm, in which, a multimode interference (MMI) structure is introduced into an optical power splitter. A comparison is provided for 1 × 2 MMI splitters with and without tapers, a 1 × 2 MMI splitter with tapers is designed, fabricated and measured, which show a wider...
In this paper, a compact triplexer is proposed by cascading three tilted multimode interference couplers for FTTH applications. AH components based on silicon rib waveguides. Firstly, a MMI coupler is designed to separate the 1310 nm wavelength band by using pseudo self-imaging technique. A tiled MMI coupler is then cascaded to separate the 1490 nm and 1550 nm wavelength bands. Numerical simulations...
Military, public safety and science divers conduct operations in what can be one of the most inhospitable environments on the planet characterized by extreme temperature, pressure, and extremely poor visibility. Handheld displays and gauges can be virtually useless in an environment frequently characterized by zero visibility, and this has been a serious limitation to underwater manned diving operations...
We developed an adhesive bonding process to integrate silicon nanomembranes onto silicon chips. A grating-coupled 1-to-32 H-tree optical distribution is experimentally demonstrated with an excess loss of 2.2 dB and a uniformity of 0.72 dB.
In 2013, Tornado Spectral Systems introduced OCTANE-860, the first chip-based nanophotonic spectrometer for spectral-domain OCT. Technology advantages and challenges have been identified during development and a new strategy for optimizing performance will be discussed.
We introduce OCTANE, the first product line of chip-based spectrometers using silicon photonics for spectral domain optical coherence tomography (SD-OCT). It is well suited for low-cost, high-volume applications in both the medical and industrial fields.
The fabrication of optical waveguides, using Etching During the Indiffusion of Ti (EDIT) technique, on z-cut lithium niobate crystals of different compositions is presented. It's compatibility with electric field domain engineering is also demonstrated.
We report the fabrication of optical waveguides in z-cut 5 mol% Mg-doped congruent LiNbO3 using the etching during indiffusion of Ti (EDIT) technique. Waveguiding is demonstrated at 633 nm and 1550 nm and effective index and loss measurements of waveguide at 1550 nm are also presented.
A novel structure of optical to THz signal converter consisting of a plasmon waveguide at THz range is proposed and analyzed. High conversion rate between optical and THz signals was estimated. It can be integrated with optical waveguide and THz RTD oscillator.
We experimentally demonstrated a highly compact 1-to-2 multimode interference splitter to achieve polarization insensitive ultra-low loss behavior. The excess loss is 0.112 dB and 0.184 dB for TE and TM mode, respectively.
By integrating a polarization mode converter we have obtained significant amounts of Transverse Electrical light from a quantum cascade laser. First results indicate up to around 18%TE light in an elliptically polarized output.
We report the observation of an ultra-narrow band plasmon induced transparency resonance which is realized in a large area hybrid plasmon-waveguide system consisting of a gold nanowire array embedded in a slab waveguide.
Various photonic devices covering passive to active functions have been developed and monolithically-integrated on a silicon wire waveguide platform. Obstacles to practical applications are being eliminated by applying state-of-art fabrication technologies and unique device designs.
The critical coupling criteria between dielectric waveguides and lossy surface plasmons is applied to isolator designs. This framework shows that non-reciprocal plasmon-semiconductor waveguides are not achievable, and alternatives are proposed.
A transverse-magnetic-pass (TM-pass) copper (Cu) polarizer is proposed and analyzed using the previously published two-dimensional Method-of-Lines beam-propagation model. The proposed polarizer exhibits a simulated high-pass filter characteristics, with TM0 and TE0 mode transmissivity of >;70% and <;5%, respectively, in the wavelength regime of 1.2-1.6 μm. The polarization extinction ratio (PER)...
The multi-mode interference effect in a multi-mode Ti:LiNbO3 waveguide has been analyzed depending on the wavelength and the polarization states of input wave at bout 1300 nm region.
We propose and demonstrate a spectral phase and amplitude modulator with a 100-GHz free-spectral range capable of mitigating signal impairments. The processor achieves 1.8-GHz optical resolution over 80-GHz usable bandwidth, with 557-MHz addressable granularity.
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