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We show that high efficiency stimulated Raman scattering can be obtained using hollow core photonic crystal fiber with the core filled with a low refractive index nonlinear liquid. This new architecture opens new perspectives in the development of nonlinear functions as any kind of nonlinear liquid media can now be used to implement them, with original properties not accessible with silica core fibers.

We report on the experimental demonstration of a white-light supercontinuum generation in normally dispersive singlemode air-silica microstructured fiber. We demonstrate that the simultaneous excitation of the microstuctured fiber in its normal and anomalous dispersion regimes using the fundamental and second harmonic signals of a passively Q-switched microchip laser leads to a homogeneous supercontinuum in the visible range. This pumping scheme allows the suppression of the cascaded Raman effect predominance in favor of an efficient spectrum broadening induced by parametric phenomena. A flat supercontinuum extended from 400 to 700 nm is achieved.

International university students can experience isolation amid academic pressures. Such circumstances can manifest as or exacerbate depression. This qualitative study involved 15 international male students at a Canadian university who were diagnosed or self-identified as having depression. Individual interviews revealed men's perspectives about causes, implications, and management of depression. Participants intertwined sex- and gender-based factors in detailing causes, and emphasized the potential for parents to impact depression. Implications of depression for embodying traditional masculine roles of breadwinner and career man influenced many men to filter details about their illness within "home" cultures. This practice often prevailed within Canada despite the men's perceptions that greater societal acceptance existed. Masculine ideals underpinned self-management strategies to fight depression and regain control. Counter to men's reluctance to disclose illness details were participants' self-management preference for peer-based support. Study findings highlight how masculine ideals and cultural constructs can influence depression experiences and expressions.

Depression can be a pathway to older men's suicide, yet the mechanisms by which this can occur are poorly understood. A qualitative study of 22 older men who self-identified or were formally diagnosed with depression was conducted to describe the connections between masculinity, depression, and suicide. Analyses of individual interviews revealed that cumulative losses around social bonds were central to older men's depression, apathy for living, and thoughts about suicide. Prominent were men's self-assessments of failing to fulfill breadwinner roles, judgments that led participants to ruminate on their shortcomings amid recognizing their older age as limiting opportunities for redemption. Stigma featured as a barrier for men acting on their suicidal thoughts, and guilt about the pain their suicide would evoke on family and friends was a strong deterrent for men's self-harm. Overall, participants' alignment to masculine ideals influenced both the connectedness and detachment between older men's depression and suicide.

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We present a photosensitive three-hole microstructured optical fiber specifically designed to improve the refractive index sensitivity of a standard fiber Bragg grating (FBG) sensor photowritten in the suspended Ge-doped silica core. We describe the specific photowriting procedure used to realize gratings in such a fiber. We then determine their spectral sensitivity to the refractive index changes of material filling the holes surrounding the core. The sensitivity is compared with that of standard FBGs photowritten in a six-hole fiber with a larger core diameter. We demonstrate an improvement in the sensitivity by two orders of magnitude and reach a resolution of 3 x 10(-5) and 6 x 10(-6) around mean refractive index values of 1.33 and 1.40, respectively.