摘要:
Mechanically adjustable fiber optic attenuators and attenuation systems are disclosed for adjustably extracting optical energy from a fiber optic, and therefore attenuating the optical signal being transmitted through the fiber optic. In one aspect, material is removed from a portion of the fiber optic, thereby exposing a surface through which optical energy can be extracted. A cylindrical-shaped preform is selectively positioned into and out of engagement, e.g., physical contact, with the interaction surface of the side-polished fiber for adjustably extracting the optical energy.
摘要:
Controllable fiber optic attenuators and attenuation systems are disclosed for controllably extracting optical energy from a fiber optic, and therefore attenuating the optical signal being transmitted through the fiber optic. In one aspect, material is removed from a portion of the fiber optic, thereby exposing a surface through which optical energy can be extracted. A controllable material is formed over the surface for controllably extracting optical energy according to a changeable stimulus applied thereto, which affects the refractive index thereof. In an improved embodiment, a controllable material is formed over the exposed surface for controlling the amount of optical energy extracted from the fiber optic, and a bulk material is formed over the controllable material, into which the extracted optical energy is radiated. The controllable material has a controllable index of refraction approximately matching the index of refraction of the cladding of the fiber optic, and the bulk material formed over the controllable material has a fixed index of refraction higher than the effective mode index of refraction of the fiber optic. This cladding-driven design varies the effective optical thickness of the controllable material, and therefore effects a controllable attenuation of the optical signal being transmitted in the fiber optic. Attenuation systems including these controllable attenuators, as well as control and sense sub-systems, are also disclosed.
摘要:
A log splitting machine having a disk-like blade rotatable about an axis and able to split a log in a single 360.degree. rotation about said axis. The blade has two parts, each of which performs a different function. The first part of the blade has a spiral-shaped cutting edge designed to sufficiently penetrate into an end of a log to be split so as to form a lengthwise crack in the log. The second part of the blade has a widening edge designed to separate the log into two pieces along the lengthwise crack with further rotation of the blade. The log splitting machine also includes: an adjustable backstop for accommodating logs of different length; a frame for supporting the blade, log and adjustable backstop; an electric motor for powering the blade through a 360.degree. rotation; and a hood covering the blade and motor, and a deadman control switch for increased operator safety.
摘要:
A polishing fixture, and method, comprising a base. A shaft is joined with the base. A platform is joined with the shaft and located remote from the base. A sample holder is joined with the shaft, wherein the platform moves relative to the base and the sample holder. In operation, the invention comprises fixing a device to the sample holder of the fixture and then placing the fixture on a polishing surface in a polishing position wherein the device is automatically positioned adjacent the polishing surface.
摘要:
Controllable fiber optic attenuators and attenuation systems (100) are disclosed for controllably extracting optical energy from a fiber optic (30), and therefore attenuating the optical signal being transmitted through the fiber optic (30). In one aspect, material is removed from a portion of the optical fiber (30), thereby exposing a surface through which optical energy can be extracted. A controllable material is formed over the surface for controllably extracting optical energy according to a changeable stimulus applied thereto, which affects the refractive index thereof. In an improved embodiment, a controllable material is formed over the exposed surface for controlling the amount of optical energy extracted from the fiber optic, and a bulk material is formed over the controllable material, into which the extracted optical energy is radiated.
摘要:
A polishing fixture, and method, comprising a base. A shaft joined with the base. A platform joined with the shaft and located remote from the base. A sample holder joined with the shaft, wherein the platform moves relative to the base and the sample holder. In operation, the invention comprises affixing a device to the sample holder of the fixture and then placing the fixture on a polishing surface in a polishing position wherein the device is automatically positioned adjacent to the polishing surface. Thereafter, the fixture can be removed from the polishing surface and the fixture inverted to assume a position for inspecting the device.