Highpower twocolor cw raman fiber laser is obtained with simultaneous outputs at 1239 nm and 1484 nm which uses cw 8. It maps the spectral information to the time domain and resolves raman. Raman fiber lasers have progressed quickly in the past decade, and have emerged as a versatile laser. Osa allfiberized cascaded random raman fiber laser with. This fieldproven fiber supports high growth applications, and performs well over a wide temperature range. Pdf spectral variation in brillouinraman fiber laser. Raman systems application ready raman spectrometers raman spectroscopy, raman fiber probes, raman microscopes with 532 7851064 lasers, high quantum efficiency back thinned, cooled ccd. A high efficiency architecture for cascaded raman fiber lasers arxiv. Pdf rayleighbased raman fiber laser with passive erbium. In this paper, we reported both the experimental demonstration and theoretical analysis of a raman fiber laser based on a master oscillatorpower amplifier configuration. This variation is partly attributed to the cavity modes interaction through intralinefwm residing the same spectralwidth.
Currently, raman fiber lasers are the only known wavelength agile, scalable, highpower fiber laser technology that can span the wavelength. The raman fiber laser adopted the dualwavelength bidirectional pumping configuration, utilizing 976 nm laser diodes and 1018 nm fiber lasers. Yet despite its advantages over erbiumdoped fiber, raman. Ultrafast raman fiber laser based on cavity matching. The raman fiber laser therefore initiates at 1118 nm and generates pulses with narrow pulse width of 647 ps or pulse energy upto 22 nj.
Solid state lasers and laser diodes from rpmc lasers inc. Ultrafast raman fiber laser with random distributed. High power, fixed and tunable wavelength, grating free. Osa power scaling of raman fiber amplifier based on the. The laser cavity is made of two nested pairs of fiber bragg gratings inscribed in a 2. Laser emission is demonstrated at a wavelength of 3. On the other hand, in the field of highpower fiber lasers, a very attractive option is provided by fiber raman lasers frls, due to their high output power, high efficiency and broad gain. With the 190 m passive fiber, the output power increases from 99. Osa repetition frequency modulated fiber laser for. This significantly lowers threshold pump powers down to practical levels and furthermore enables continuouswave operation. Rpmc lasers, the leading laser distributor in north america for over 20 years, offers solid state lasers, amplifiers, fiber lasers, and diode lasers from the leading laser manufacturers, primarily in the us.
The technique can thus provide a fiber laser with a wavelength shift from the pump laser but within the raman gain spectrum of the fiber. Since the raman gain spectrum is fixed solely by the fiber material and the pump. In fiber based lasers, tight spatial confinement of the pump light is maintained over relatively large distances. The fiber raman laser consists of an 85 m long germaniumdoped doubleclad fiber in a 4% 100% linear cavity, which is endpumped by a multimode ytterbiumdoped fiber laser source at 1064 nm. Dualwavelength bidirectional pumped highpower raman. The novel raman fiber laser system cannot only achieve synchronization between the raman laser. Agiltron is the worlds leading supplier of optical switches, optical attenuators, optical tunable filters, high optical power components, and fiber monitors.
Comparison between simulation and experiment on raman. Modeling of multiwavelength raman fiber lasers using a new. Pdf versatile raman fiber laser for sodium laser guide star. The dualcomb coherent antistokes raman scattering cars technique has been proposed and developed for many years with various applications. Mediumpower cw raman fiber lasers selected topics in. A 589nm raman laser can be used for a laser guide star in the form of a sodium beacon for atmospheric correction in an astronomical observatory. A raman fiber laser with more than 220 w output at 1.
The laser consists of a 30 m long piece of fiber and a pair of fiber. Cascaded random raman fiber lasers crrfls with simple configuration and high spectral purity have become a great candidate for power scaling over the 1. Pdf statistics of a turbulent raman fiber laser pierre. Simultaneous twocolor cw raman fiber laser with maximum.
Numerical modeling and optimization of cascaded cw raman fiber. This laser in turn could be used as a pump laser for the 1550. An all fiber raman fiber oscillator operating at 2118 nm pumped by homemade thuliumdoped fiber laser with continuous output power of 4. Pump power fiber laser fiber bragg grating output coupler. Stimulated raman scattering microscopy with a robust fibre. Thus, in contrast to output powers achieved with other types of cascaded raman lasers previously, the output powers with distributed feedback based raman lasers. It was in this environment that the cascaded raman fiber laser rfl was invented. Available in two options multiwavelength excitation 630785 nm and singlewavelength excitation 532 and 785 nm, these fiber probes have a bifurcated design, connecting the probe to both a laser.
Yet despite its advantages over erbiumdoped fiber, raman amplification was not used in the first generation of deployed optically amplified systems. For over seventeen years, we have been providing and delivering worldclass fiber. The laser system is based on the key realization that the difference frequency of the two major fiber gain media, erbium er and ytterbium yb, corresponds to the highwavenumber region of raman spectra25, where most srs imaging is performed. Allfiber continuouswave raman fiber oscillator operating. Request pdf raman fiber lasers this book serves as a comprehensive, up todate reference about this cuttingedge laser technology and its many new and.
Raman fiber lasers have progressed quickly in the past decade, and have emerged as a versatile laser technology for generating high power light sources. High performance transmission laser pigtails polarizationbased modulators high data rate communications systems polarizationsensitive components raman. Pdoped fiber offers a raman shifted gain that is three times higher than the germaniumdoped fibers. A highpower 589 nm laser based on raman fiber amplifier is reported here. Fiber optic raman spectroscopy system features spectrecology. Stimulated raman scattering has long been used to bridge the gap between the rareearth emission bands. A fiber raman laser, or possibly a cascade of raman fiber lasers, can be used for pumping an erbiumdoped fiber amplifier. It uses an original algorithm which makes the model robust and fast. Pdf 270km ultralong raman fiber laser juan diego ania. We would like to show you a description here but the site wont allow us. Fiber amplifiers and fiber lasers based on stimulated raman.
The use of stimulated raman scattering srs as a means of amplifying signals in telecommunication systems has been demonstrated since 1976. This work focuses on a secondary pumping scheme for remote lband erbiumdoped fiber amplifier redfa generated by integrating rayleighbased ultralong raman fiber laser ulrfl with a section of passive erbiumdoped fiber. Vr supradeepa, yan feng, jeffrey w nicholson journal of optics 19. An erbiumdoped fluoride glass quasicw fiber laser emitting at 3. Using a revolver silica fibre with a hollow core filled with molecular hydrogen 1h2 as an active medium, we have. Raman amplifiers should comply with itut recommendations for laser safety 40 and with the class 1m hazard level according to iec standard 608252 41, which requires a method to detect a line fiber cut or disconnected fiber. Osa bidirectional pumped high power raman fiber laser. Various aspects and trends of raman fiber lasers are described in detail by experts in their fields. Currently, raman fiber lasers are the only known wavelength agile, scalable, highpower fiber laser technology that can span the wavelength spectrum. Raman fiber lasers based on a single pass cascaded amplifier configuration. In 1988, the first raman fiber laser based on fiber.
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