Compact and robust laser system for rubidium laser cooling based on the frequency doubling of a fiber bench at 1560 nm

Lienhart, F.; Boussen, Salah; Carraz, Olivier; Bidel, Yannick; Bresson, Alexandre

doi:10.1007/s00340-007-2775-7

Cited by 64 publications

(23 citation statements)

References 12 publications

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“…Nowadays, with the promotion of liquid cooling applications, liquid cooling CAC have now replaced the conventional air cooling CAC, as liquid cooling CAC exhibits full boost power and a faster acceleration response, as well as better fuel economy compared to traditional air cooling CACs [56][57][58][59], and thus the overall packaging volume and compartment weight could be reduced [60,61]. Additionally, to lower the lubricating oil temperature during cold start up, oil cooling systems began to be adopted in the 1990s [62,63], They are beneficial to reduce NOx and HC emissions [64,65]. However, by placing together all the above thermal systems in the limited underhood space, significant amounts of heat will be expelled to the ambient [66] and would be very difficult to fulfill their requirements with a single circuit and to match their different thermal needs properly with each other [67,68].…”

Section: Combination With Other Cooling Circuitsmentioning

confidence: 99%

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

et al. 2017

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Abstract:With the increasing demands for vehicle dynamic performance, economy, safety and comfort, and with ever stricter laws concerning energy conservation and emissions, vehicle power systems are becoming much more complex. To pursue high efficiency and light weight in automobile design, the power system and its vehicle integrated thermal management (VITM) system have attracted widespread attention as the major components of modern vehicle technology. Regarding the internal combustion engine vehicle (ICEV), its integrated thermal management (ITM) mainly contains internal combustion engine (ICE) cooling, turbo-charged cooling, exhaust gas recirculation (EGR) cooling, lubrication cooling and air conditioning (AC) or heat pump (HP). As for electric vehicles (EVs), the ITM mainly includes battery cooling/preheating, electric machines (EM) cooling and AC or HP. With the rational effective and comprehensive control over the mentioned dynamic devices and thermal components, the modern VITM can realize collaborative optimization of multiple thermodynamic processes from the aspect of system integration. Furthermore, the computer-aided calculation and numerical simulation have been the significant design methods, especially for complex VITM. The 1D programming can correlate multi-thermal components and the 3D simulating can develop structuralized and modularized design. Additionally, co-simulations can virtualize simulation of various thermo-hydraulic behaviors under the vehicle transient operational conditions. This article reviews relevant researching work and current advances in the ever broadening field of modern vehicle thermal management (VTM). Based on the systematic summaries of the design methods and applications of ITM, future tasks and proposals are presented. This article aims to promote innovation of ITM, strengthen the precise control and the performance predictable ability, furthermore, to enhance the level of research and development (R&D).

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Section: Combination With Other Cooling Circuitsmentioning

confidence: 99%

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

et al. 2017

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“…In order to cool and manipulate 87 Rb, we need a laser source emitting at 780 nm. We have chosen to take advantage of existing fiber optics components in the telecom C-band around 1.5 µm, and generate the final optical frequency by Second Harmonic Generation (SHG) [12,13]. This way, we have a setup which is almost entirely fibered and therefore immune to vibration-induced misalignments.…”

Section: B Laser Sourcementioning

confidence: 99%

A transportable cold atom inertial sensor for space applications

Ménoret

Geiger

Stern

et al. 2017

International Conference on Space Optics — ICSO 2010

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I. INTRODUCTIONAtom interferometry has hugely benefitted from advances made in cold atom physics over the past twenty years, and ultra-precise quantum sensors are now available for a wide range of applications [1]. In particular, cold atom interferometers have shown excellent performances in the field of acceleration and rotation measurements [2,3], and are foreseen as promising candidates for navigation, geophysics, geo-prospecting and tests of fundamental physics such as the Universality of Free Fall (UFF). In order to carry out a test of the UFF with atoms as test masses, one needs to compare precisely the accelerations of two atoms with different masses as they fall in the Earth's gravitational field. The sensitivity of atom interferometers scales like the square of the time during which the atoms are in free fall, and on ground this interrogation time is limited by the size of the experimental setup to a fraction of a second. Sending an atom interferometer in space would allow for several seconds of excellent free-fall conditions, and tests of the UFF could be carried out with precisions as low as 10 -15 [4]. However, cold atoms experiments rely on complex laser systems, which are needed to cool down and manipulate the atoms, and these systems are usually very sensitive to temperature fluctuations and vibrations. In addition, when operating an inertial sensor, vibrations are a major issue, as they deteriorate the performances of the instrument. This is why cold atom interferometers are usually used in ground based facilities, which provide stable enough environments. In order to carry out airborne or space-borne measurements, one has to design an instrument which is both compact and stable, and such that vibrations induced by the platform will not deteriorate the sensitivity of the sensor.We report on the operation of an atom interferometer on board a plane carrying out parabolic flights (Airbus A300 Zero-G, operated by Novespace). We have constructed a compact and stable laser setup, which is well suited for onboard applications. Our goal is to implement a dual-species Rb-K atom interferometer in order to carry out a test of the UFF in the plane. In this perspective, we are designing a dual-wavelength laser source, which will enable us to cool down and coherently manipulate the quantum states of both atoms. We have successfully tested a preliminary version of the source and obtained a double species magneto-optical trap (MOT).

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“…Stable single-frequency, single-polarized laser sources in 1.5 μm band is desired in the application of coherent communication, LIDAR etc [1][2][3][4]. Fiber lasers based on Er 3+ /Yb 3+ co-doped phosphate glass fiber seem to be the most effective way to achieve high power single frequency operation and have been investigated extensively in the last several years, with both distributed Bragg reflective (DBR) and distributed feedback (DFB) configuration demonstrated in references [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Investigation of single-polarized phosphate glass fiber laser and its self-pulsing behavior

Yang

Pan

et al. 2011

SPIE Proceedings

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A compact short-cavity fiber laser configured with Er 3+ /Yb 3+ highly co-doped phosphate glass fiber which has linear polarization and single frequency output is fabricated experimentally. The threshold power of the laser is about 30mW, and larger than 100mW output power is achieved with slope efficiency of 20% at 1549nm. At the meantime, sine modulation, positive pulse and chaos state in the output power at different experimental condition are observed. And a new theoretical model is proposed to describe the mechanism of the observed intensity instability behavior in the fiber laser and the numerical results proved its feasibility. It is confirmed that the self-pulsing behavior is mainly caused by different small external feedback. So there is an efficient way to overcome self-pulsing behavior in the compact single polarized fiber laser by minimizing the external feedback.

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Compact and robust laser system for rubidium laser cooling based on the frequency doubling of a fiber bench at 1560 nm

Cited by 64 publications

References 12 publications

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

A transportable cold atom inertial sensor for space applications

Investigation of single-polarized phosphate glass fiber laser and its self-pulsing behavior

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