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9 pags., 7 figs., 1 tab. ; We present, for the first time, an experimental demonstration of RIN noise transfer dampening at low frequencies in random distributed feedback ultralong Raman fibre lasers based on conventional telecommunication fibres. Furthermore, we present a thorough theoretical description of the phenomenon and demonstrate how our model can be used to predict the observed behaviour, identifying the general requirements for system improvement through RIN transfer reduction. ; Comunidad de Madrid (AEI/FEDER funds TALENTO-CM 2017-T2/TIC-5227, SINFOTON2- CM (S2018-NMT/4326)); Horizon 2020 Framework Programme (Marie Sklodowska-Curie—748839); LAPHIA (Lasers and Photonics in Aquitaine); Conseil Régional d'Aquitaine (2017-1R50302- 00013493); Universidad de Alcalá (CCG19/IA-051); Spanish Government (PID2019-107270RBC22, RTI2018-RTI2018-097957-B-C33).

We have developed a Watt-level random laser at 532 nm. The laser is based on a 1064 nm random distributed ytterbium-gain assisted fiber laser seed with a 0.35 nm line-width and 900 mW polarized output power. A study for the optimal length of the random distributed mirror was carried out. An ytterbium-doped fiber master oscillator power amplifier architecture is used to amplify the random seeder laser without additional spectral broadening up to 20 W. By using a periodically poled lithium niobate(PPLN) crystal in a single pass configuration we generate in excess of 1 W random laser at 532 nm by second harmonic generation with an efficiency of 9%. The green random laser exhibits an instability 70 dB, 0.1 nm linewidth and excellent beam quality. ; Agence Nationale de la Recherche (ANR) (ANR14 LAB05 0002 01); Conseil Régional d'Aquitaine (2014–IR60309-00003281); Horizon 2020 Framework Programme (H2020) (Marie Sklodowska-Curie—748839); Lasers and Photonics in Aquitane (LAPHIA); Spanish Government (TEC 2016-76021-C2-1-R); AEI/FEDER Funds.

Background: The availability of family caregivers of older people is decreasing in Italy as the number of migrant care workers (MCWs) hired by families increases. There is little evidence on the influence of socioeconomic factors in the employment of MCWs. Method: We analyzed baseline data from 438 older people with moderate Alzheimer's disease (AD), and their family caregivers enrolled in the Up-Tech trial. We used bivariate analysis and multilevel regressions to investigate the association between independent variables - education, social class, and the availability of a care allowance - and three outcomes - employment of a MCW, hours of care provided by the primary family caregiver, and by the family network (primary and other family caregivers). Results: The availability of a care allowance and the educational level were independently associated with employing MCWs. A significant interaction between education and care allowance was found, suggesting that more educated families are more likely to spend the care allowance to hire a MCW. Discussion: Socioeconomic inequalities negatively influenced access both to private care and to care allowance, leading disadvantaged families to directly provide more assistance to AD patients. Care allowance entitlement needs to be reformed in Italy and in countries with similar long-term care and migration systems. � 2015 The Author 2015. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved.