Transistor outline (TO) packaged tunable optical filter

Abstract

The invention relates to the field of optical filter devices and discloses a transistor outline (TO) packaged tunable optical filter. The TO packaged tunable optical filter includes an input end, an output end, a TO base including pins, a tunable etalon group made of a heat-sensitive material, a micro electro mechanical system (MEMS) reflection lens having an adjustable angle and a support base group are arranged on the TO base, the heights of support bases of the support base group are different, each etalon of the tunable etalon group is separately arranged on each support base, heating resistor films are plated on the etalons, and the etalons are separately in electric connection with the pins on the TO base, the pins are connected to a heating controller, the heating controller controls the heating temperature of the etalons so as to realize thermal tuning of the etalons, a TO pipe cap is further arranged on the TO base, the reflection lens and the etalons are packaged in the pipecap, and the input end and the output end are connected to a top end of the pipe cap. The TO packaged tunable optical filter has the following beneficial effect: multiple functions, a small size, lowcost, a short optical path, low polarization related loss and good insertion loss consistency.

Description

technical field [0001] The invention relates to the field of optical filter devices, in particular to a tunable optical filter packaged by TO. Background technique [0002] At present, there are many technologies that can be used for tunable optical filters. The tunable filtering technology mainly uses the interference or diffraction effect of light to realize optional filtering. Specifically, it can be divided into acousto-optic tunable filter type, fiber Bragg grating type, FP cavity type and thin film filter type. Among them, the acousto-optic TOF uses the acousto-optic effect to change the waveguide refractive index period to form a grating. Its tuning speed is fast, but the manufacturing cost is high, and the isolation of adjacent channels is poor, so it is not suitable for dense wavelength division multiplexing DWDM systems. Fiber Bragg grating TOF uses fiber Bragg diffraction characteristics to adjust stress by controlling temperature changes. Its bandwidth and adjac...

AI Technical Summary

Problems solved by technology

Although the packaging of this solution can obtain a TOF with a large tuning range, the structure is relatively complicated and difficult to realize, so the price is relatively high

The disadvantage of purely using thermally tuned solid etalon is that the tuning range is relatively narrow. For example, although AEGIS FILTER itself can achieve only one single peak output in a wide wavelength range, it needs to change the temperature to achieve a wide tuning range. The range is very wide. For example, to achieve a tuning range of 5THz, the required temperature change value is about 500 degrees, which is almost impossible to achieve

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