608 results about "Seeds source" patented technology

An apparatus, method and system that uses a Q-switched laser or a Q-seed source for a seed pulse signal having a controlled high-dynamic-range amplitude that avoids and/or compensates for pulse steepening in high-gain optical-fiber and/or optical-rod amplification of optical pulses. Optionally, the optical output is used for LIDAR or illumination purposes (e.g., for image acquisition). In some embodiments, well-controlled pulse shapes are obtained having a wide dynamic range, long duration, and not-too-narrow linewidth. In some embodiments, upon the opening of a Q-switch in an optical cavity having a gain medium, the amplification builds relatively slowly, wherein each round trip through the gain medium increases the amplitude of the optical pulse. Other embodiments use quasi-Q-switch devices or a plurality of amplitude modulators to obtain Q-seed pulses. These configurations provide optical pulses having wide dynamic ranges that ameliorate problems of pulse steepening, non-linear spectral broadening and the like in very-high-power MOPA devices.

Methods and systems for increasing the threshold for stimulated Brillouin scattering are described. A seed source may generate one or more chirped seed pulses characterized by a pulse duration τ, and a frequency chirp. The pulse duration τ may be greater than about 2 nanoseconds. A photonic crystal amplifier amplifies the seed pulses to produce one or more amplified pulses characterized by a peak power P greater than about 1 kilowatt. The pulse duration τ, frequency chirp, and the photonic crystal fiber may be selected such that a threshold for stimulated Brillouin scattering (SBS) in the photonic crystal fiber is greater than the peak power P.

A method and apparatus for the in vivo location and tracking of a radioactive seed source during and after brachytherapy treatment. The method comprises obtaining multiple views of the seed source in a living organism using: 1) a single PSPMT detector that is exposed through a multiplicity of pinholes thereby obtaining a plurality of images from a single angle; 2) a single PSPMT detector that may obtain an image through a single pinhole or a plurality of pinholes from a plurality of angles through movement of the detector; or 3) a plurality of PSPMT detectors that obtain a plurality of views from different angles simultaneously or virtually simultaneously. The plurality of images obtained from these various techniques, through angular displacement of the various acquired images, provide the information required to generate the three dimensional images needed to define the location of the radioactive seed source within the body of the living organism.

The invention relates to pulsed optical sources formed of a source of seed optical radiation, a pulsed optical amplifier for pulsing the seed optical radiation, and an output optical port for outputting a pulsed optical signal produced by the pulsed optical amplifier. An optically isolating element such as an optical circulator is provided in the optical path between the optical seed source and the pulsed optical amplifier.

A method for pumping remote optically-pumped fiber amplifiers (ROPAs) in fiber-optic telecommunication systems is disclosed which uses cascaded Raman amplification to increase the maximum amount of pump power that can be delivered to the ROPA. According to the prior art, high power at the ROPA pump wavelength, λp, is launched directly into the fiber and the maximum launch power is limited by the onset of pump depletion by Raman noise and oscillations due to the high Raman gain at ˜(λp+100) nm. In preferred embodiments of the present invention, a ‘primary’ pump source of wavelength shorter than λp is launched into the delivery fiber along with two or more significantly lower-power ‘seed’ sources, among which is included one at λp. The wavelength and power of the seed source(s) are chosen such that, when combined with the high-power primary source, a series, n, where n≧2, of Raman conversions within the fiber ultimately leads to the development of high power at λp. In another embodiment, one or more of the seed sources at wavelengths shorter than λp are replaced by reflecting means to return, into the fiber, backward-travelling amplified spontaneous Raman scattered light resulting from high power in the fiber at a wavelength one Raman shift below the particular seed wavelength. In either case, the high power at λp is developed over a distributed length of the fiber, reaching its maximum some distance into the fiber and exceeding the maximum power possible at that point with the prior art.

The invention relates to a cultivation method of dendrobium candidum, comprising the following steps of: paving the ground: levelling a land, and then sequentially paving a quicklime powder layer, a gardening ground cloth, a gravel layer and a shading net layer from bottom to top; forming rectangular land; building a shed; selecting the specifications of species and germchits: selecting seed sources in Zhejiang and domesticated seedlings obtained by domesticating tissue culture seedlings transplanted out of bottles for more than one year; and culturing. In the invention, the layers of multiple-layer ground pavements are not mutually influenced, the gravel layer can be used as a water filtering layer to provide a good root growth environment for the dendrobium candidum, and the multiple-layer ground pavements also physically obstruct insect pest sources from underground to a peripheral space with a matched insect prevention measures together, thereby not only saving the cost by reducing the use amount of pesticides, but also greatly enhancing the edible safety of the dendrobium candidum. The cultivation method of the dendrobium candidum creates an optimal environment for the growth of the dendrobium candidum from roots and the ground aiming at the artificial cultivation of a rare and endangered traditional Chinese medicinal material, i.e. the dendrobium candidum, and is used for carrying out pest control by adopting a full-physical method, thereby effectively reducing the generation of plant diseases and insect pests and realizing the safe and efficient cultivation.

A tunable pulsed laser includes a seed source and an optical circulator. The optical circulator includes at least a first port coupled to the seed source, a second port, and a third port. The laser also includes an amplitude modulator characterized by a first optical side and a second optical side. The first optical side is coupled to the second port of the optical circulator. The laser further includes a first optical amplifier characterized by an input end and a reflective end. The input end is optically coupled to the second side of the amplitude modulator. The laser additionally includes a tap coupler optically coupled to the amplitude modulator and characterized by a pre-determined split ratio. Moreover, the laser includes a first photo-detector optically coupled to the tap coupler and adapted to receive a portion of the seed signal transmitted through the amplitude modulator and to generate an output signal.

A system and method for coordinating the production, processing, and utilization of seed is provided. In various embodiments, the method and system aggregate seed inventory data, identify seed requests, and query the seed requests against the seed supply information. If the query results in a match a seed source can be automatically identified. Further, identified seed can be automatically allocated to the identified seed request from the identified seed source.

Briefly, the present invention relates to a system for combining the output light beams of a plurality of semiconductor laser diodes, for example, to form a combined light beam with increased brightness. The output light beams from the semiconductor laser diodes are coupled to a plurality of optical fibers forming a fiber coupled diode array. The optical fibers forming the fiber coupled diode array are coupled to a dual clad optical fiber with a central core. The output light beams from the optical fibers from the fiber coupled diode array are coupled to the inner cladding of a dual clad optical fiber. A Stokes seed source is applied to the central core, and the inner-clad diode light acts as a pump source to amplify the Stokes beam by stimulated Ramans scattering, thereby transferring power from the inner cladding into Stokes beam in the central core. The configuration in accordance with the present invention provides a Stokes output light beam with a relatively higher brightness level than known techniques which merely combine the output light beams from a plurality of semiconductor diodes and eliminates the need for a relatively precise alignment and the cost associated with the lenses required by known systems.

A laser system for processing a workpiece includes a tunable pulsed laser source having an output comprising a set of optical pulses. The tunable pulsed laser source includes a seed source, an optical circulator having a first port coupled to the seed source, a second port, and a third port, a modulator driver, and an amplitude modulator coupled to the modulator driver. The tunable pulsed laser source also includes a first optical amplifier characterized by an input end and a reflective end and a second optical amplifier coupled to the third port of the optical circulator. The laser system also includes a controller configured to adjust laser parameters of the tunable pulsed laser source, a supporting member configured to support the workpiece, and an optical system configured to adjust laser beams from the tunable pulsed laser source and direct them towards the workpiece.

A tunable pulsed laser source comprising a seed source adapted to generate a seed signal and an optical circulator. The optical circulator includes a first port coupled to the seed source, a second port, and a third port. The laser source also includes an amplitude modulator characterized by a first side and a second side. The first side is coupled to the second port of the optical circulator. The laser source further includes a first optical amplifier characterized by an input end and a reflective end including a spectral-domain reflectance filter. The input end is coupled to the second side of the amplitude modulator. Moreover, the laser source includes a second optical amplifier coupled to the third port of the optical circulator.

The invention discloses a production method of bletilla seed stems, which comprises the following steps: 1) explant treatment and inoculating, 2) protocorm obtaining and multiplication, 3) differentiation and seedling forming of protocorms, 4) test-tube corm obtaining, 5) primary seed stem obtaining and 6) secondary seed stem obtaining. According to the method, mature bletilla seeds are subjected to aseptic seeding and culture, many test-tube seed stems are obtained, and the larger production seed stems capable of being grown in a large field are obtained by primary and secondary seed stem reproduction. The method solves the problem of a low survival rate of direct exercising of tissue culture seedlings, provides a seed source for manual massive bletilla planting, and lays a foundation for sustainable development, exploitation and utilization of bletilla.

A computer controlled environment system and method are used to provide the optimum environmental and nutritional conditions for the growth and development of seed potato cuttings for the initiation and development of tubers that can be used as the seed source for further multiplication under field conditions as seed potato stock. Use of a controlled environment system and method that provides optimum cultural conditions results in rapid growth and development of the potato cutting so as up to six crops of tubers can be harvested in a calendar year.

The invention relates to the tissue culture quick propagation technology of stevia rebaudiana seedlings, which comprises the following steps of: (1) selecting facilities; (2) selecting a female parent garden; (3) selecting a seed source; (4) preparing a culture medium; (5) obtaining explants; (6) performing subculture; and (7) performing rooting culture. By the tissue culture quick propagation technology, a large number of high-quality stevia rebaudiana seedlings can be cultured, the problem of short supply of stevia rebaudiana on the market is solved, the large-area planting of the stevia rebaudiana can be popularized, and national incomes are increased.

A tunable pulsed laser source comprising a seed source adapted to generate a seed signal and an optical circulator. The optical circulator includes a first port coupled to the seed source, a second port, and a third port. The laser source also includes an amplitude modulator characterized by a first side and a second side. The first side is coupled to the second port of the optical circulator. The laser source further includes a first optical amplifier characterized by an input end and a reflective end including a spectral-domain reflectance filter. The input end is coupled to the second side of the amplitude modulator. Moreover, the laser source includes a second optical amplifier coupled to the third port of the optical circulator.

The invention relates to a method capable of effectively preventing and treating the root rot of angelica, which belongs to the technical fields of medicinal plant cultivation and plant protection. The invention is an integrative preventing and treating method for the root rot of the angelica, which takes the prevention of an agricultural measure as a main part and the prevention and the treatment of a medicament as an auxiliary part. The method comprises the following steps: planting a disease resisting seed source, planting at a high-altitude region, carrying out crop rotation reasonably, adopting healthy seeds and seedlings, improving the permeability of the field, enhancing the management of fertilizer and water, clearing diseased leaves and stubbles, applying pesticide with low toxicity and low residue to land blocks which are easily attacked and suffer from comparatively serious diseases and carrying out chemical prevention and treatment. The typical investigation of the technology shows that the economic loss of a farmer can be redeemed by 20-30% under an equivalent condition. The invention has the advantages of simple and convenient operation, lower cost and obvious economic benefit and social benefit, solves the problem of the disease of the root rot of the angelica effectively, increases the yield of the angelica, can also ensure the quality and safety of medicinal materials and is widely suitable for the planting of the medicinal materials of the angelica.

The present invention provides a system for providing a seed grower with conditioned seed for planting the following cropping cycle from a portion of the harvested crop from a single seed production field. In one embodiment, the system includes an agreement between the seed production company and seed grower to plant and produce a varietal crop for seed purposes with specific genetic characteristics. The seed grower is initially furnished with source seed from the seed production company that matches these specified genetic characteristics and required to meet defined process specifications and results. At appropriate corresponding times during the planting, growing and harvesting processes, a seed production company representative and/or grower may inspect the seed grower's seed source, planting, cultivating, machinery, transport and storage. The results of these inspections, along with recorded seed grower information and data are put into a database which is used to track the criteria the seed grower and seed production company will reference to determine if conditioned seed fulfills agreement specifications. An ensuing agreement is negotiated each subsequent year between the seed production company and the seed grower to allow the seed grower to select a specified conditioned portion of the crop harvested from his/her seed production field for purchasing for planting the following cropping cycle.

A single-mode and all-fiber coherent Doppler wind speed measurement laser radar emission source is characterized by being formed by sequentially connecting an all-fiber seed source, a seed isolator, a seed beam splitter, an acousto-optic modulation device, a pre-amplifier stage, a chopper and a main amplifier stage in a cascading mode. The single-mode and all-fiber coherent Doppler wind speed measurement laser radar emission source has the advantages that the all-fiber property is achieved, the human eyes are protected, the line width reaches megahertz, linear polarization is achieved, the pulse contrast is high, and single-mode polarization-maintaining lasers are output; repeated frequency, laser pulse width and laser waveform can be adjusted within the wide range, and the laser radar wind speed measurement requirements for different detection distances, different distance resolution ratios and different wind speed update rates from laser radars can be met.