Integrated-optical amplitude modulator for high power applications

Werner, Ekkehard; Ruske, J.-P.; Zeitner, B.; Biehlig, W.; Tünnermann, Andreas

doi:10.1016/s0030-4018(03)01460-3

Cited by 4 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With all these unique features, KTP crystals have been widely used in various types of important integrated optic fields, for example, switches [3], phase modulators [4], amplitude modulators [5], and nonlinear directional couplers [6]. In the last decade, the KTP crystal has attracted significant attention with regard to frequency doubling [7] and frequency conversion [8], especially under the situation of low power density.…”

Section: Introductionmentioning

confidence: 99%

Visible and near-infrared optical properties of a proton-implanted KTP waveguide

Zhou

Liu

et al. 2014

Appl. Opt.

View full text Add to dashboard Cite

In this work, the optical properties of potassium titanyl phosphate (KTP) waveguides in the visible and near-infrared region are reported. The KTP waveguides were fabricated using 550 keV proton implantation at room temperature, and the refractive index profiles of the implanted region in the visible and near-infrared region were reconstructed. The profiles of the guided modes were measured through the end-face coupling method with both 632.8 and 1539 nm laser sources and then compared with the simulation results using the beam propagation method. Optical transmission and Raman spectra in the original substrate and waveguide active region were measured to study microstructural changes. The propagation loss of the TM0-mode at 632.8 nm was also measured.

show abstract

Section: Introductionmentioning

confidence: 99%

Visible and near-infrared optical properties of a proton-implanted KTP waveguide

Zhou

Liu

et al. 2014

Appl. Opt.

View full text Add to dashboard Cite

show abstract

“…These waveguide requires a new modulation concept, which was demonstrated as asymmetric diffraction amplitude modulator. So it is possible to guide and modulate light of some watts in singlemode (Werner et al 2003). Further investigations are due to material improvement for integrated-optical purposes, especially using upgrading of lithium niobate substrates by liquid phase epitaxial layer deposition.…”

Section: Technology: Integrated Opticsmentioning

confidence: 99%

Near-Infrared Fiber Imager for the VLTI

Neuhäuser¹,

Tünnermann²,

Hempel³

et al.

The Power of Optical/Ir Interferometry: Recent Scientific Results and 2nd Generation Instrumentation

View full text Add to dashboard Cite

Abstract.For detection of massive close-in exo-planets around other stars, a contrast of ∼ 0.3% is sufficient and can be achieved with state-of-the-art single-mode fibers as spatial filter. For lower-mass planets, much higher accuracy is neccessary. Apart from the atmosphere, there are several sources of noise which degrade the phase stability of interferometers based on bulk optics by changes in the optical path. For direct detection of low-mass exo-planets and for direct observation of convection on giant stars, our two main science goals, as well as for secondary science goals such as lower-mass faint circumstellar disks around both nearby low-mass stars as well as more distant high-mass stars and for the direct detection of close spectroscopic binary (T Tauri) stars and to follow their orbits for direct dynamical mass determination, we need more than two apertures to fill the uv-plane, again very complicated with bulk-optics. Integrated optics allows to solve these problems and to minimize the components. We have experiences in the development and fabrication of integrated-optical circuits and modulators in various wavelength ranges, i.e. from visible to the telecommunication band, as well as integrated-optical sensor systems like interferometers. Starting from two channel interferometers for the J-band at 1.55µm based on Lithiumniobat, we will develop multichannel-interferometer systems for longer wavelengths. Such systems with new materials and fibers for the near-and thermal infrared can then be used, e.g., for 2nd Gen VLTI instrumentation.

show abstract