Widely wavelength tunable fast intensity-modulated light source for biophotonic applications.

High modulation depth, fast (megahertz to gigahertz), intensity-modulated light sources of various wavelengths within the 0.7-1.35 µm bio-penetration window are highly desirable for many biophotonic diagnosis systems. In this Letter, we present a novel scheme of a wavelength tunable, ultra-broadband light source which simply consists of a pump laser, a nonlinear fiber, and demodulation circuits. The working wavelength range of the light source is from 0.7 to 1.35 µm which covers a vast part of the bio-penetration window, and its modulation frequencies extends from tens of megahertz to gigahertz. The performances of the proposed light source in either working wavelength range or modulation frequency bandwidth are much superior to any typical laser diodes or solid state lasers currently employed in the frequency-domain or other biophotonic utilization. The wide applicability of this novel light source in diverse biophotonic applications can be observed from our carefully designed diffused optical spectroscopy phantom measurement.

[Nursing experience for a cancer recurrence patient in puberty].

This case report discusses the impact on the mind and body of a cancer recurrence patient in puberty, as he comes to terms with, and adjusts to, a recrudescence in his illness. In our study of the nursing process, we used Gorden's assessment tools for health patterns and gathered subjective or objective information through interviews and observations to establish case problems (i.e., "changes in body and mind", "personal maladjustments related to changes" "injuries of high risk" and "oral cavity mucosa ulcers", etc.). After gaining an understanding of the previous medical treatments employed in this case, in a way of respecting the medical selection and considering the developmental task at the stage of life, we provided support and encouragement through appropriate communications and expressions of sympathy with the objective of enhancing patient self-caring and capacity for adjustment in order to help the patient achieve the best possible quality of life.