Fibre Optical Sensor light transmitting-receiving subassembly
Technical field
The utility model relates to a kind of light transmitting-receiving subassembly that Fibre Optical Sensor is subjected to field and fiber optic communication field that is used for, particularly a kind of Fibre Optical Sensor light transmitting-receiving subassembly.
Background technology
With the optical fibre gyro is the sensory field of optic fibre of representative, employed light source and detector all are discrete devices, and super-radiance light emitting diode (SLD) is as wideband light source, and the PIN-FET assembly is then as photo-detector, used a coupling mechanism to connect between them, structured flowchart is seen Fig. 1.Wherein, super-radiance light emitting diode (SLD) generally adopts the encapsulation of 8pin butterfly type, the PIN-FET photo-detector generally adopts 14pin or the encapsulation of 8pin dual-in-line type, volume is all bigger comparatively speaking, add coupling mechanism, limit the further miniaturizations of Fibre Optical Sensor such as optical fibre gyro, thereby limited the range of application of Fibre Optical Sensors such as optical fibre gyro.Simultaneously, because above-mentioned each discrete device all leaves the tail optical fiber about 1 meter, so that fused fiber splice, and each welding all can bring the insertion loss, and the multistage tail optical fiber need coil fixing, and every tail optical fiber is coiled into ring and is fixed on the skeleton all needing after the welding, technology controlling and process is difficult, and consistance is difficult to guarantee.
In the optical communication field, the light transmitting-receiving subassembly is used widely, and mainly is coaxial packaging, uses the laser instrument and the detector of TO type, utilizes the light splitting piece beam splitting, have simple in structure, characteristics such as volume is little, structure is seen Fig. 2.But owing to adopt non-wideband light source, and do not have temperature control, the wavelength instability does not meet the optical fibre gyro application requirements.
The utility model content
The utility model provides a kind of integrated level height, volume is little, output power is high, consumption is hanged down damage and can be reduced by at least fused fiber splice 3 times, can guarantee the Fibre Optical Sensor light transmitting-receiving subassembly of better consistance and reliability.
For solving the problems of the technologies described above, the utility model is realized as follows: Fibre Optical Sensor described in the utility model is made up of with photoelectric detector chip and the preposition resistance amplifying circuit of striding with high linearity photoelectric detector chip, supervision super-radiance light emitting diode, coupling mechanism or beam splitter, reception with the light transmitting-receiving subassembly; Super-radiance light emitting diode places coupling mechanism or beam splitter below in vertical direction; Receive with the high linearity photoelectric detector chip and be prepended to coupling mechanism or beam splitter left side; Monitor with photoelectric detector chip and place coupling mechanism or beam splitter top in vertical direction; The preposition resistance amplifying circuit of striding is electrically connected with the high linearity photoelectric detector chip with reception.
The described preposition resistance amplifying circuit of striding mainly is made up of field effect transistor, microwave triode and other microwave component.
Good effect of the present utility model: Fibre Optical Sensor described in the utility model adopts the photoelectricity integrated technique of chip-scale with the light transmitting-receiving subassembly, characteristics such as its remarkable advantage is the integrated level height, volume is little, output power is high, the low damage of consumption have great importance for the miniaturization of optical fibre gyro.Also owing to simplify technology, help to improve the consistance and the reliability of Fibre Optical Sensors such as optical fibre gyro simultaneously.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 traditional fiber gyro principle block diagram
Fig. 2 optical communication light transmitting-receiving subassembly structural drawing
Fig. 3 uses optical fibre gyro theory diagram of the present utility model
Fig. 4 is the utility model structural representation
Among the figure, 1 smooth transmitting-receiving subassembly 2 super-radiance light emitting diodes
3 coupling mechanisms or beam splitter 4 receive uses the high linearity photoelectric detector chip
5 monitor with the photoelectric detector chip 6 preposition resistance amplifying circuits of striding
7 light splitting pieces, 8 laser instruments, 9 detectors
Embodiment
As shown in Figure 4, Fibre Optical Sensor described in the utility model is made up of with photoelectric detector chip 5 and the preposition resistance amplifying circuit 6 of striding with high linearity photoelectric detector chip 4, supervision super-radiance light emitting diode 2, coupling mechanism or beam splitter 3, reception with light transmitting-receiving subassembly 1; Super-radiance light emitting diode 2 places coupling mechanism or beam splitter 3 belows in vertical direction; Receive and be prepended to coupling mechanism or beam splitter 3 left sides with high linearity photoelectric detector chip 4; Monitor and place coupling mechanism or beam splitter 3 tops in vertical direction with photoelectric detector chip 5; The preposition resistance amplifying circuit 6 of striding is electrically connected with high linearity photoelectric detector chip 4 with reception.
The described preposition resistance amplifying circuit 6 of striding mainly is made up of field effect transistor, microwave triode and other microwave component.
Above-mentioned Fibre Optical Sensor adopts the encapsulation of 14pin Can all-metal with light transmitting-receiving subassembly 1, adopts ceramic substrate thick film hybrid integrated circuit technology, is with single mode or protects the inclined to one side tail optical fiber coupling way of output.