Menlo Systems GmbH

Menlo, Germany

Menlo Systems GmbH

Menlo, Germany
SEARCH FILTERS
Time filter
Source Type

A method for operating a laser device, including providing a laser pulse in a resonator so that the laser pulse circulates in the resonator, the laser pulse having a carrier wave; determining an offset frequency (f_(0)) of the frequency comb corresponding to the laser pulse, the frequency comb having a plurality of laser modes (f_(m)) at a distance (f_(rep)) from one another, the frequencies of which can be described by the formula: f_(m)=m*f_(rep)+f_(0), m being a natural number, and varying the offset frequency (f_(0)) by varying a geometric phase () that is imparted to the carrier wave of the laser pulse per resonator circulation.


The invention relates to a method for operating a laser device, comprising the steps: a) providing a laser pulse (110) in a resonator (1) so that the laser pulse (10) circulates in the resonator (1), the laser pulse (10) having a carrier wave (120); b) determining an offset frequency (f0) of the frequency comb corresponding to the laser pulse (110), the frequency comb having a plurality of laser modes (fm) at a distance (frep) from one another, the frequencies of which can be described by the formula: fm = m * frep + f0, m being a natural number; and c) varying the offset frequency (f0) by varying a geometric phase () that is impressed on the carrier wave (120) of the laser pulse (110) per resonator revolution.


Grant
Agency: European Commission | Branch: H2020 | Program: CSA | Phase: INFRAINNOV-02-2016 | Award Amount: 1.99M | Year: 2017

A scientific and technological paradigm change is taking place, concerning the way that very high performance time and frequency reference signals are distributed, moving from radio signal broadcasting to signal transport over optical fibre networks. The latter technology demonstrates performance improvements by orders of magnitude, over distances up to continental scale. Research infrastructures are developing several related technologies, adapted to specific projects and applications. The present project aims to prepare the transfer of this new generation of technology to industry and to strengthen the coordination between research infrastructures and the research and education telecommunication networks, in order to prepare the deployment of this technology to create a sustainable, pan-European network, providing high-performance clock services to European research infrastructures. Further this core network will be designed to be compatible with a global European vision of time and frequency distribution over telecommunication networks, enabling it to provide support to a multitude of lower-performance time services, responding to the rapidly growing needs created by developments such as cloud computing, Internet of Things and Industry 4.0. The project aims at partnership building and innovation for high performance time and frequency (clock) services over optical fibre networks and to prepare the implementation of such a European backbone network.


Grant
Agency: European Commission | Branch: FP7 | Program: MC-ITN | Phase: FP7-PEOPLE-2013-ITN | Award Amount: 3.87M | Year: 2013

During the last decades atomic clocks and frequency standards have become an important resource for advanced economies with impact ranging from satellite navigation (GPS, GLONASS, Galileo) to high speed communication networks, where they ensure synchronisation of data packets at ever higher bit rates. In this field the wake of the new millennium has been marked by the invention of frequency comb technology, a discovery so important that it was awarded the Nobel Prize in Physics in 2005. Femtosecond comb technology enables two major advances (i) a factor of 1000 improvement in sensitivity and accuracy over current atomic clock technology and (ii) the possibility to create a precision frequency synthesizer ranging from the Hz level up to 10^17 Hz or even higher, i.e. covering the electromagnetic spectrum from DC to the soft x-ray regime. The technological impact of this current development is likely to be tremendous, opening new applications, e.g. in relativistic geodesy, where ultraprecise clocks sense the gravitational potential via the redshift arising from general relativity. This might open new markets in oil and mineral exploration, supervision of CO2 sequestration and hydrology and climate research. However the technologies associated with optical clocks and frequency standards are still in the laboratory stage and experts in the field are desperately needed for developing commercially viable systems and applications. This ITN is addressing this issue by implementing a training programme covering all aspects from the atomic reference and ultrastable lasers to frequency comb synthesis, precision frequency distribution and commercial system technology. It focuses on technological developments enhancing the technology readiness level of the new optical atomic clocks, enhancing the chance that they are picked up by the commercial sector. At this initial stage the vehicle will be space technology, which is promising the first high-precision applications.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2011.9.1 | Award Amount: 2.87M | Year: 2012

Despite significant research efforts during the past 10 years, the terahertz (THz) spectral range remains vastly underexploited, owing essentially to the insufficient signal-to-noise ratio (SNR) achievable with present technology. The projects aim is to address this problem by building a new technological platform enabling the generation of high power, broad bandwidth, THz frequency combs (FCs) with a high frequency stability. The demonstration of FCs in the visible and near-IR spectral ranges has been among the main breakthroughs in the field of optics in the past decade. FCs are commonly generated by mode-locked lasers. In the frequency domain they consist of a broad spectrum of narrow lines, separated by a constant frequency interval, corresponding, in the time domain, to the repetition rate of the emitted pulse train. The time duration of the emitted pulses is roughly given by the inverse of the spectral bandwidth. Due to the lack of mode-locked lasers, FCs in the THz range are nowadays generated by inherently inefficient non-linear conversion techniques. This is the main cause for the low SNR of present THz systems. The THz FCs envisioned in this project will be based on THz quantum cascade lasers (QCLs), a novel, compact and powerful THz semiconductor laser source. THz FCs will be generated by mode-locked THz QCLs, and/or by using THz QCLs as semiconductor amplifiers. This will allow the production of FCs with average powers in excess of 10mW, with a spectral bandwidth > 1THz, and a corresponding pulse duration < 1ps. Such high power THz FCs will be combined with highly sensitive coherent detection techniques based on compact fs-fiber lasers that will be developed ad hoc in this project. The ultimate goal is the realization of an enabling THz technology, which may be adapted for a wide variety of applications in fields such as Physics, Chemistry, Biology and Medicine.


Patent
Menlo Systems GmbH | Date: 2014-09-04

In a laser (12, 18) with a laser resonator (13), the laser resonator (13) comprises a non-linear optical loop mirror (1, 1), NOLM, which is adapted to guide counter-propagating portions of laser pulses, and to bring the counter-propagating portions of laser pulses into interference with each other at an exit point (4) of the NOLM (1, 1). The invention is non-linear optical loop mirror (1, 1) comprises a non-reciprocal optical element (7, 7) on a linear section of the NOLM. In addition to the NOLM, the laser resonator (13) comprises a linear cavity section. The linear section of the NOLM and the linear cavity section (19) a reassembled on a microoptical bench (112) or within a cylindrical carrier (112).


In a resonator arrangement (1) including a resonator (2) an interferometer (9) is arranged inside the resonator (2) and includes at least a first and a second interferometer leg (9a, 9b). The two interferometer legs (9a, 9b) have optical path lengths (L1, L2) that differ from each other. According to the invention a splitting ratio is variably adjustable, with which the interferometer (9) splits radiation (8) circulating in the resonator (2) into the first and second interferometer legs (9a, 9b).


Patent
Menlo Systems GmbH | Date: 2013-09-11

In a laser (12, 18) with a laser resonator (13), the laser resonator (13) comprises a non-linear optical loop mirror (1, 1), NOLM, which is adapted to guide counter-propagating portions of laser pulses, and to bring the counter-propagating portions of laser pulses into interference with each other at an exit point (4) of the NOLM (1, 1). The invention is characterized by the non-linear optical loop mirror (1, 1) comprising a non-reciprocal optical element (7, 7).


Patent
Menlo Systems GmbH | Date: 2013-06-26

The invention relates to a system (1) for generating a (high-frequency) beat signal. The system comprises a first light source (3) with a multimode spectrum, a second light source (4) and a coupler and filter arrangement (5) with a first port (6) for coupling in light from the first light source (3), and a second port (7) for coupling in light from the second light source (4). Furthermore, a detector (11) is provided to which light of both light sources (3, 4) can be supplied. The coupler and filter arrangement (5) comprises a spectral filter (20, 28) for filtering out one or several modes from the spectrum of the first light source (3), and a first fiber-optical coupler (17, 23, 26) for coupling the light of the second light source (4) and the not yet filtered or the already filtered light of the first light source (3). The coupler and filter arrangement (5) is configured to be merely fiber-optical according to the invention.


Patent
Menlo Systems GmbH | Date: 2015-03-11

In a laser (12, 18) with a laser resonator (13), the laser resonator (13) comprises a nonlinear optical loop mirror (1, 1), NOLM, which is adapted to guide counter-propagating portions of laser pulses, and to bring the counter-propagating portions of laser pulses into interference with each other at an exit point (4) of the NOLM (1, 1). The invention is nonlinear optical loop mirror (1, 1) comprises a non-reciprocal optical element (7, 7) on a linear section of the NOLM. In addition to the NOLM, the laser resonator (13) comprises a linear cavity section. The linear section of the NOLM and the linear cavity section (19) a reassembled on a microoptical bench (112) or within a cylindrical carrier (112).

Loading Menlo Systems GmbH collaborators
Loading Menlo Systems GmbH collaborators