搜索结果: 1-15 共查到“光电子技术 frequency”相关记录52条 . 查询时间(0.045 秒)
New Design Results in Compact,Highly Efficient Frequency Comb
New Design Results Compact Highly Efficient Frequency Comb
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2017/3/30
Northwestern Engineering researchers have designed a quantum cascade laser (QCL) frequency comb that is dramatically more efficient than previous iterations. Led by Manijeh Razeghi, researchers i...
Entrainment of Micromechanical Limit Cycle Oscillators in the Presence of Frequency Instability
Limit cycles micromechanical devices optical resonators oscillators thermomechanical processes
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2015/8/27
The nonlinear dynamics of micromechanical oscil-lators are explored experimentally. Devices consist of singly and doubly supported Si beams, 200nm thick and 35 μm long.When illuminated within a laser ...
Generation of 1500-tone, 120nm-wide Ultraflat Frequency Comb by Single CW Source
Generation of 1500-tone 120 nm-wide Ultraflat Frequency Comb Single CW Source
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2014/11/6
Dense 1500-tone frequency comb is derived from a single CW laser. Sub-2dB flatness was measured over 120 nm, with 40 dB optical signal-to-noise-ratio. The new generator uses regenerative shock formati...
THz-Wave Generation from GaP THz Photonic Crystal Waveguides under Difference-Frequency Mixing
THz-Wave Generation Photonic Crystal Waveguide Nonlinear Optical Effect
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2013/1/30
GaP terahertz (THz) two-dimensional (2D) photonic crystal (PC) waveguides with line defects were fabricated using inductively-coupled plasma reactive-ion etching (ICP-RIE) in Ar/Cl2 gas chemistries. T...
Novel Optical Vector Signal Generation with Carrier Suppression and Frequency Multiplication Based on a Single-Electrode Mach-Zehnder Modulator
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2011/11/18
RADIO-OVER-FIBER (ROF) systems have attracted much interest for potential use in future broadband wireless communications. Essential to ROF systems is the ability to generate and transmit optical radi...
Optical Fiber Link with 1E-19 frequency stability using a Planar-Waveguide External Cavity Laser Diode
Optical Fiber Link 1E-19 frequency Planar-Waveguide External Cavity Laser Diode
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2011/8/3
Abstract: We compare the performances of a compact planar-waveguide external cavity laser (ECL) and a traditional fiber laser (FL) frequency locked to a Fabry-P\'erot cavity and demonstrate the possib...
Scattered Pilot Channel Tracking Method for PDM-CO- OFDM Transmissions Using Polar-Based Intra-Symbol Frequency-Domain Average
Fiber optics communications Modulation
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2015/5/25
We have demonstrated an efficient scattered pilot channel tracking approach with a new polar-based intra-symbol frequency domain average (ISFA) for 16-QAM, 40-Gb/s PDM-CO-OFDM systems. This proposal c...
Cyclic Prefix Free 10-Gb/s OFDM for a DML-Based Long- Reach Optical Access Using Joint Time and Frequency Domain Equalization Algorithm
Fiber optics links subsystems Modulation
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2015/5/25
Without using a cyclic prefix, a DML-based 10-Gb/s OFDM at 2.5-GHz bandwidth transmission over 65-km SMF is demonstrated to be possible while maintaining the efficient throughput and short-latency tim...
Frequency conversion of mid-infrared optical signals into the telecom band using nonlinear silicon nanophotonic wires
Integrated optics Wavelength conversion devices Integrated optics Nonlinear
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2015/5/22
We demonstrate parametric conversion with simultaneous 19.5dB amplification, of a mid-IR 2440nm signal to the telecom-band near 1620nm, using silicon nanophotonic wires.Conversion over 820nm is facili...
Tunable nonlinear frequency conversion of bismuth-tellurite glass holey fiber
Nonlinear optics fiber Harmonic generation and mixing
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2015/5/22
We report on tunable parametric generation (PG) and third-harmonic generation (THG) in a 2.9-μm core bismuth-tellurite holey glass fiber. The maximum conversion efficiency was measured to be 0.1% and ...
All-Optical THz-band Frequency Multiplexing on A Single Optical Carrier Using Fiber Cross-Phase Modulation
Optical THz-band Frequency Multiplexing Single Optical Carrier Fiber Cross-Phase Modulation
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2015/5/21
We developed an ultra-broadband all-optical frequency multiplexing technique on asingle optical carrier using cross-phase modulation in nonlinear fibers, and demonstrated sequentially multiplex of mul...
Microwave Photonic Filters with a Directly Generated Gaussian-shaped Optical Frequency Comb
Microwave Photonic Filters Directly Generated Gaussian-shaped Optical Frequency Comb
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2015/5/21
Using electro-optic modulators, we generate a 41-line 10-GHz spaced Gaussian-shaped optical comb. We use this comb to demonstrate apodized microwave photonic filters with greater than 43-dB sidelobe s...
A Broadband, Spectrally Flat, High Rep-rate Frequency Comb: Bandwidth Scaling and Flatness Enhancement of Phase Modulated CW through Cascaded Four-Wave Mixing
Broadband Spectrally Flat High Rep-rate Frequency Comb Bandwidth Scaling Flatness Enhancement Phase Modulated CW Cascaded Four-Wave Mixing
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2015/5/20
We demonstrate a scheme to scale the bandwidth by several times while enhancing spectral flatness of frequency combs generated by intensity and phase modulation of CW lasers using cascaded four-wave m...
High power monolithic all-fiber counter-propagating pumped single-frequency amplifier
High power monolithic all-fiber counter-propagating pumped single-frequency amplifier
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2015/5/20
We present a monolithic all-fiber, counter-propagating pumped, single-frequency amplifier with an output power of 47 W.
Large range microwave frequency measurement using a fiber delay interferometer pair
fiber delay interferometer pair microwave frequency measurement
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2015/5/15
We demonstrate a photonic approach to IFM using two parallel home-made fiber delay interferometers, packaged into a 10cm×8cm board. A maximum measurement frequency of 36.7GHz and measurement error les...