摘要:
Described is a storage system that operates with a diskless enclosure. The diskless enclosure comprises a communication port connected to an arbitrated loop, a plurality of storage ports each being connectable to a disk module, and port bypass control circuitry. The port bypass control circuitry includes retimer circuitry for retiming communication signals passing through the communication port to and from the arbitrated loop. The port bypass control circuitry forwards retimed communication signals to the arbitrated loop without any storage port of the plurality of storage ports having a disk module connected thereto.
摘要:
An optical fiber suitable for generation of a supercontinuum spectrum when light pulses of femtosecond (10null15 sec.) duration are launched at a certain wavelength into the fiber. The fiber includes a number of sections of highly non-linear fiber (HNLF) wherein each section exhibits a different dispersion at the wavelength of the launched light pulses. The fiber sections are joined, for example, by fusion splicing the sections in series with one another so that the dispersions of the sections decrease from an input end to an output end of the fiber. In the disclosed embodiment, a low noise, coherent supercontinuum spanning more than one octave is generated at the output end of the fiber when pulses of light of 188 fs duration are launched into the fiber at a repetition rate of 33 MHz and with an energy of three nanojoules per pulse.
摘要:
A measurement system is provided for a combustion engine. The measurement system employs a fiber optic cable optically coupled to a light source and has at least one Bragg grating. A second fiber optic cable is coupled to the first fiber optic cable in addition to a wavelength measurement device and a device for measuring intensity. A controller is coupled to the device for measuring intensity and the wavelength measurement device. Based upon the measurements from these devices, the controller determines the temperature and pressure in the combustion engine.
摘要:
A retaining clip for retaining a strip of optical fiber. The clip includes a mounting base for mounting the clip to a mounting surface. A first spacing leg and a second spacing leg are both attached about their respective first ends to the mounting base. A first retaining leg and a second retaining leg are attached to the first and second spacing legs adjacent their respective second ends. The first and second retaining legs respectively defining a first and a second overlapping segment respectively extending generally inwardly beyond the second and first retaining leg second ends. The first and second overlapping segments are in a generally parallel and spaced relationship relative to each other so as to define an insertion slot therebetween. The insertion slot defining an insertion slot longitudinal axis extending in a generally parallel relationship relative to the spacing between the spacing leg first ends. The clip is configured and sized so as to allow insertion of the strip of optical fiber in the insertion slot while respecting the minimum bend radius of the fiber and so as to reduce the risks of having the strip of fiber slip out of the clip.
摘要:
A light pipe having one or more exterior protrusions that function as a secondary light source and an alignment component. The one or more exterior protrusions may provide a secondary light source by reflecting light from a primary light source. The one or more exterior protrusions also may function to align the light pipe with a lamp assembly or an object on which the light pipe is mounted. Further, a lamp assembly having a light pipe receiving portion, with one or more slits to allow an opening to expand upon insertion of the light pipe, and to provide a retention force upon contraction.
摘要:
A light integrator comprising: an elongated cylindrical light integrating cavity having a longitudinal cylindrical chamber wall with a diffusely reflecting interior surface, said chamber wall having a longitudinally extending output slit for emitting light from the cavity; an elongated glass rod extending into the cavity, said glass rod having an input port at one end thereof for introducing the beam of light and a treatment along its length for emitting light entering its port into the cavity; and an end wall including a supporting feature for supporting an end of the elongated glass rod opposite its input port so that the glass rod extends along a length of the integrating cavity in relation to the chamber wall thereof to direct light emitted therefrom toward the diffusely reflecting interior surface, whereby the supporting feature comprises a bore that is recessed into the end wall with a linear dimension leaving an enclosed open space between the end of the glass rod and the end wall of the cavity for diffusely reflecting light reaching the end of the rod back into the rod for another opportunity to exit the rod through the treatment.
摘要:
This invention relates to an optical fiber for amplification suitable for amplifying signals in the L-band, an optical fiber amplifier including the optical fiber, and an optical transmission system. The optical fiber amplifier according to the invention includes a silica-based optical fiber as an optical fiber for amplification, which has a core region doped with Er and Al. The optical fiber for amplification has an Er concentration of 1,500 wt.ppm or less, and has the characteristics at a wavelength of 1.53 nullm of: an absorption loss of 10 dB/m or more but 25 dB/m or less; and an unsaturated absorption of 900 dB or less.
摘要:
A waveguide type variable optical attenuator has: a substrate; two optical circuits that are in parallel formed on the substrate, each of the optical circuits including two couplers that conduct the branching and coupling of light and are connected to the input port and output port of light and two waveguides through which the two couplers are connected; a polarization maintaining fiber one end of which is connected to the output port of one of the two optical circuits and the other end of which is connected to the input port of the other of the two optical circuits while being twisted 90null; and a heater that is provided around neighboring waveguides of the two optical circuits such that the neighboring waveguides share heat to be generated by the heater.
摘要:
Viscous flow and volume consolidation which may cause sensor output drift are avoided in a fiber optic sensor by using a body of crystalline and preferably monocrystalline material to establish the transducer gap. Use of a monocrystalline material also reduces chemical reactivity of the sensor with substances which may be present where the sensor is deployed. The increased dimensional stability of the monocrystalline body in a tube-based, V-groove-based or other type of fiber optic sensor reduces the need for and frequency of recalibration.
摘要:
A polarisation beam splitter (1) comprises a substrate (2) and a branched waveguide (3) formed on top of the substrate (2) and having a main portion (4) and two branch portions (5) and (6) with gradual splitting angles relative to the main portion (4) for conducting respective polarisation components along respective axes. One of the branch portions (5) is formed with a dielectric coating (7) in the region in which the branch portion (5) splits off from the main portion (4). The dielectric coating (7) serves to stress or de-stress the branch portion (5) in the region of the branching junction relative to the branch portion (6), such that different polarisation components in the main portion (4) are split apart along respective branch portions (5) and (6) by the resulting differential birefringence. Such an arrangement, which may also be applied to a combiner, is advantageous since it provides efficient splitting of polarisation components and is easily fabricated.