laser pointer battery protection and energy-saving design

laser pointer battery protection and energy-saving design.
Displacement type optical attenuator is based on this principle, intends to allow optical fiber in the dock, the occurrence of a certain dislocation. Loss of light energy, so as to achieve the purpose of controlling attenuation, the displacement type optical attenuator is divided into two kinds: horizontal displacement type optical attenuator, the axial displacement type optical attenuator. The lateral displacement type optical attenuator is a more traditional method, the magnitude of the transverse displacement parameters in the micron level, it is generally not used to produce variable attenuator is only used in the production of a fixed attenuator, and welding or stick connection, there are still a large market, the advantage of high return loss, is generally greater than 60dB. laser pointer is the professional assistants for teaching and lecturing with PPTs.
Two fiber axial displacement type optical attenuator on the process design as long as the machinery to a certain distance for the purpose of attenuation, can be achieved. This principle is mainly used for the production of fixed optical attenuator, and some small variable optical attenuator. The film-type optical attenuator. This attenuator is made of light reflected light in the metal film surface, the principle of film thickness. If the thickness of the metal film deposited on glass substrate is fixed, it is made of a fixed optical attenuator. If oblique inserted in the fiber deposition have different thickness of a disc-type metal thin wax glass substrate, so that the thin film of different thickness of metal inserted in the optical path, you can change the intensity of the reflected light, you can get different attenuation volume, made of the variable attenuator. For different line interface, you can use a variety of fixed attenuators; If the interface is a pigtail, available pigtail type optical attenuator is welded to the optical path between the two fiber; connector system debugging process interface converter or converter-mounted attenuator. It is the uninterrupted wireless RF technology of laser pointer .
In practical applications often need optical attenuator attenuation amount can be changed with user needs. Therefore, the variable attenuator, a broader range of applications. EDFA, CATV optical system design margin of the actual system of the optical power margin is not exactly the same, for example, the system BER assessment to prevent receiver saturation, it must be inserted in the system variable optical attenuator, the other in the fiber optics (such as optical power meter or OTDR) measurement, calibration will also be using the variable attenuator.