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Monolithically-integrated distributed feedback laser compatible with CMOS processing
2017-07-19 An optically-pumped, integrated distributed feedback laser is demonstrated using a CMOS compatible process, where a record-low-temperature deposited gain medium enables integration with active devices such as modulators and detectors. A pump threshold of 24.9... |
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Three-dimensional imaging of distribution of refractive index by parallel phase-shifting digital holography using Abel inversion
2017-07-19 Although digital holography is a powerful technique obtaining a phase image of a transparent object, the image reconstructed by the technique merely expresses phase distribution of the light wave after transmitting through the object. Phase variation of insid... |
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10 Gb/s long-reach PON system based on directly modulated transmitters and simple polarization independent coherent receiver
10.1364/OE.25.017841 2017-07-18 We demonstrate a coherent 10 Gb/s PON system solution exploiting a direct modulated laser (DML) transmitter to obtain long reach (>100 km). The system exploits a simplified coherent receiver. This receiver, which is similar to the scheme that we recently prop... |
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Low noise frequency comb carriers for 64-QAM via a Brillouin comb amplifier
10.1364/OE.25.017847 2017-07-18 Optical frequency comb lines with poor carrier to noise ratio (CNR) are significantly improved by Brillouin amplification using its extreme narrow bandwidth gain to suppress out of band noise, enabling higher quality signal modulation. Its application to spec... |
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Dual-etch apodised grating couplers for efficient fibre-chip coupling near 1310 nm wavelength
10.1364/OE.25.017864 2017-07-18 We present our recent work on fibre-chip grating couplers operating around 1310 nm. For the first time, we demonstrate the combination of dual-etch and apodization design approaches which may achieve a coupling efficiency of 85% (−0.7 dB). Subwavelength struc... |
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Simultaneously simulating the scattering properties of nonspherical aerosol particles with different sizes by the MRTD scattering model
10.1364/OE.25.017872 2017-07-18 In order to improve the computational efficiency of multi-resolution time domain (MRTD) scattering model, a multi-size synchronous-computational scheme (MSCS) is proposed. By using MSCS, the scattering properties of the particles with different sizes can be s... |
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Single-shot determination of focused FEL wave fields using iterative phase retrieval
10.1364/OE.25.017892 2017-07-18 Determining fluctuations in focus properties is essential for many experiments at Self-Amplified-Spontaneous-Emission (SASE) based Free-Electron-Lasers (FELs), in particular for imaging single non-crystalline biological particles. We report on a diffractive i... |
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Experimental test of uncertainty relations for general unitary operators
10.1364/OE.25.017904 2017-07-18 Uncertainty relations are the hallmarks of quantum physics and have been widely investigated since its original formulation. To understand and quantitatively capture the essence of preparation uncertainty in quantum interference, the uncertainty relations for... |
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Through-barrier electromagnetic imaging with an atomic magnetometer
10.1364/OE.25.017911 2017-07-18 We demonstrate the penetration of thick metallic and ferromagnetic barriers for imaging of conductive targets underneath. Our system is based on an 85Rb radio-frequency atomic magnetometer operating in electromagnetic induction imaging modality in an unshield... |
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Arrayed waveguide grating spectrometers for astronomical applications: new results
10.1364/OE.25.017918 2017-07-18 One promising application of photonics to astronomical instrumentation is the miniaturization of near-infrared (NIR) spectrometers for large ground- and space-based astronomical telescopes. Here we present new results from our effort to fabricate arrayed wave... |