Optical fiber probe for biomedical raman spectroscopy jason t motz, martin hunter, luis h galindo, joseph a gardecki, john r kramer, ramachandra r dasari, and. The raman gain coefficient has not only the waveguide dependence discussed above but also depends on the fiber material it is the material composition of the fiber that predominantly determines the spectral shape of the gain coefficient. When the raman gain corresponding to some optical wave exceeds the order of 70 db, substantial power is transferred to a stokes wave, even if there is no stokes input to the fiber this effect can limit the performance of high-power fiber lasers and amplifiers. Raman amplifiers are optical amplifiers based on raman gain they are often operated with light pulses, although continuous-wave operation is possible in some cases. Erbium-doped fiber amplifier (edfa) is the most widely used fiber-optic amplifiers, mainly made of erbium-doped fiber (edf), pump light source, optical couplers, optical isolators, optical filters and other components.
Single frequency raman fiber amplifiers mpbc's raman fiber amplifier system is capable of amplifying a narrow, linearly-polarized, nir input signal with minimum spectrum broadening. Considerations affecting the use of fiber-optic components in raman measurements for quantitative analysis are described bidirectional single-fiber probe systems and a unidirectional multi-fiber. 5 shown in figure 1 it was regularly observed that raman spectra supplies information on the fiber dye content some examples are shown in figure 2. Raman amplification in fiber optical communication systems (optics and photonics) [clifford headley, govind agrawal] on amazoncom free shipping on qualifying offers.
Raman scattering or the raman effect / since this technology easily fits into the fast evolving fiber laser field and there is demand for transversal coherent. Raman spectroscopy is a spectroscopic technique that detects photons that have undergone raman scattering since raman scattering is relatively weak compared to rayleigh scattering, one of the main historical problems with raman spectroscopy had been separating out the weak raman signal from the strong rayleigh signal. Raman accessories: a wide variety of raman sampling accessories and fiber optic probes designed to allow you to take raman spectroscopy measurements under any condition. Raman fiber probes custom probes for remote raman spectroscopy the superhead fiber optic probes are a range of high efficiency raman sensors which enable in situ, non-invasive chemical analysis to be undertaken.
Fiber optic probes for biomedical optical spectroscopy urs utzinger rebecca r richards-kortum and raman spectroscopy is illustrated we cover universal de. A high efficiency architecture for cascaded raman fiber lasers v r supradeepa,1, 1jeffrey w nichsolson, clifford e headley,1 man f yan,1 bera palsdottir 2, and dan jakobsen. Raman backscattered light from an optical fiber is greatest at shorter pump wavelengths , however, using short wavelengths results in limited dtfs range due to large fiber. An all-fiber clad pumped raman fiber laser (fl) oscillator with a cw power of 12 kw and an efficiency of 85% is presented to the best of our knowledge, this laser is the highest power and the highest efficiency raman fl demonstrated in any configuration with brightness enhancement (be. This software application, called raman tuning wizard, can take advantage of tunable transponder or muxponder units to evaluate the physical characteristics of the span's fiber, determine the optimal mix of raman pump wavelengths, and define the contribution of raman versus edfa for the overall optical amplification of the unit.
All kaiser's fiber-optic raman probes have been designed to allow our customers to conduct effective in situ process analysis through to research with raman spectroscopy rather than learning raman optical design principles robustness, reliability, and performance - hallmarks of kaiser's sampling technology. A raman optical amplifier is not a black box like an edfa it consists of little more than a high-power pump laser, usually called a raman laser, and a wdm or directional coupler the optical amplification occurs in the transmission fiber itself. The backscattering spectrum of optical fiber g652 (sio 2) has been researched, in the stokes region the first order and second order raman spectrum have been observed and the zx band backscattering spectrum is first observed. Where: gr is the fiber raman gain coefficient (approximately the same for the two fibers tested) p 0 is the raman pump power input into the fiber l eff is the effective length for the raman interaction (l.
Custom probes for remote raman spectroscopy the superhead fiber optic probes are a range of high efficiency raman sensors which enable in situ, non-invasive chemical analysis to be undertaken. The marqmetrix fiber ballprobe is the link between any raman analytical system and your sample the marqmetrix fiber ballprobe consists of two parts: the fiber head and the ballprobe convenience of an ergonomic fiber optic probe with the simplicity and repeatability of touchraman. Sulfur trioxide (so 3) is a highly reactive oxidant, and its reactions with polyethylene fibers in chlorinated solvents can be used to functionalize and stabilize the polyethylene fibers for subsequent carbonization to produce carbon fiber. Fiber optics is the branch of optics that deals with optical fibers optical fibers are thin fibers of glass or plastic that are used to transmit light signals.