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This work presents an optimization strategy towards extending the operational frequency range of piezoelectric MEMS energy harvesting devices. We propose to use coupled micromechanical resonators to enable efficient energy harvesting at multiple frequencies with a single device. The proposed design, obtained by optimization algorithms, exhibits closely spaced eigenfrequencies with equal power delivery.
We show the positive impact of differential driving on the optical QPSK signal performance. For the first time, an EVM of <6% at 32 GBd QPSK has been achieved for a low power InP-IQM design, enabling small form factor transmitters.
A high brightness diode laser module based on single emitters is presented, offering a maximum output power of 15.5 W at 35 Hz repetition rate and 100 µs pulse length. While the presented module (6xx nm) is designed and used for longitudinally pumping an alexandrite laser for atmospheric measurements, the conceptual design is suited for the whole range of diode laser wavelengths from UV to NIR as...
High speed InP-based travelling wave electrode (TWE) Mach-Zehnder modulators are presented and their integration capabilities to fabricate next generations of compact and high capacity transmitter components by utilizing so-called “monolithic-on-hybrid” integration approaches are emphasized.
Rare-earth doped fiber lasers have emerged as attractive alternatives to traditional lasers in material processing due to the ruggedness, high efficiencies, and excellent beam quality [1]. The development of pulsed fiber lasers is driven by the fact that specific applications require different peak powers, repetition rates, and pulse energies. Some of the methods of pulsing the lasers completely avoid...
The power scaling of narrow-band and near-diffraction-limited solid state laser radiation by spectral beam combining has been demonstrated during the last years with high efficiencies > 90 % [1,2] in large multiplexing modules (l ≈ 1 m). We present a diode laser prototype based on a compact dense wavelength division multiplexer (DWDM) for diode laser bars with low average beam quality (M2 = 45)...
The state-of-the art of medium and large scale InP-based Mach-Zehnder modulator PIC development is reported with regard to commercial fabrication of advanced transmitter components.
Development and characterization of monolithic, flip-chip compatible 2×50 Gb/s twin-IQ DQPSK MZ modulator chips - capable for hybrid assembly onto planar optical boards of advanced Tbit-capacity transmitter modules - is reported for the first time.
This paper reports on the first development, fabrication, and characterization of monolithic InP-based twin-IQ Mach-Zehnder modulator chips as basic building blocks for future high capacity and large scale planar optical Silica-on-Si transmitter boards. The monolithic devices are designed for hybrid assembly by utilizing passive chip alignment techniques in combination with flip-chip bonding technology...
Indium Phosphide-based Mach-Zehnder modulators (IPMZ) are a preferred transmitter solution for currently deployed optical fiber transmission links from 10 Gb/s to 100 Gb/s. The series push-pull travelling wave electrode architecture is flexible enough to provide IPMZ designs that span the entire spectrum with ease. By simple changes in electrode geometry, IPMZs can be fabricated which exhibit world...
Ultrashort laser sources with pulse durations in the sub-picosecond regime enable a new domain of precision machining of various materials. Pulse durations shorter than the electron-phonon coupling time lead to minimum thermal load or even non-thermal ablation processes. Exploiting non-linear absorption processes, the absorption becomes nearly material independent when laser pulses of several micro...
An InP-based 90° hybrid OEIC with integrated pin-photodiodes is presented. It operates unaffected in the temperature range of 15°-35° C, offering low PDL <;1 dB, and stable performance in the wavelengths of 1530 nm to 1565 nm.
Amplification by Innoslab amplifiers has been applied to ultrafast laser pulses for many years. Recent progress in high power laser diodes and a new pumping scheme made application of ytterbium doped laser crystals which support subpicosecond pulse durations possible. Ultrashort pulse experiments were carried out with a Yb:KYW fs-oscillator (HighQ Laser Innovation GmbH).To enable shorter pulse lengths...
In this paper, we present an extension of the cut-off frequency in high-order harmonic generation using two delayed few-cycles laser pulses, identical in all parameters except the carrier envelope phase (CEP), which is shifted by pi in the second pulse. We use two pulses of the same colour at fixed CEP difference and control the delay between the two pulses which enables us to shape the fundamental...
Since the idea of interactive TV has evolved and the obvious additional value of this development occurred, several platforms were realized - each with different file formats and different philosophies of implementation. Worldwide, these platforms are widespreaded, through advantages and disadvantages of each platform, difficulties of the technical realisation and political debates. Furthermore there...
A monolithically integrated InP 90deg hybrid incorporating waveguide balanced photodiodes is presented. Stable performance is achieved over a wavelength range from 1530 nm to 1565 nm.
A diode-pumped ytterbium doped INNOSLAB fs-amplifier with 400 W output power was realized. The pulse duration of the output pulses was almost transform limited 682 fs for Yb:YAG at a pulse repetition rate of 76 MHz. This was achieved at room temperature without the use of any stretcher or compressor setup.
For high throughput applications a diode-pumped Yb:YAG Innoslab fs-amplifier, scalable to several 100W, was realized. At 63.2MHz repetition rate and 77W average output power nearly transform and diffraction limited 786fs pulses are achieved so far.
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