A temperature-insensitive arrayed waveguide grating (aawg) with temperature segment compensation

Abstract

The invention relates to a temperature insensitive type arrayed waveguide grating (AAWG) with the temperature segmenting compensation function. The temperature insensitive type AAWG comprises a base, an AWG chip and a first driver (110). The first driver (110) is fixed between a base moving end (201) and a base fixed end (202). A second driver (120) is further arranged at the upper end of a chip moving end (301). The first driver (110) conducts linear under-compensation or linear over-compensation on the wave length temperature characteristic of the AWG chip. The second driver (120) conducts linear compensation on the wave length temperature characteristic of the AWG chip within a temperature interval. In the temperature interval, linear compensation of the second driver (120) and linear under-compensation of the first driver (110) are superimposed or linear compensation of the second driver (120) and linear over-compensation of the first driver (110) are counteracted. The temperature insensitive type AAWG can achieve the performance indexes of the wave length offset smaller than + / -30 pm within the temperature range from -40 DEG C to 80 DEG C.

Description

technical field [0001] The invention relates to an arrayed waveguide grating, in particular to a temperature-insensitive arrayed waveguide grating (AAWG) with temperature segmental compensation. The invention belongs to the field of optical fiber communication. Background technique [0002] Usually, AAWG adopts temperature compensation technology to keep the wavelength stable. At present, there are many patents, such as dividing the chip into two parts, connecting the input (or output) part with a metal temperature compensation rod, and driven by the thermal expansion and contraction of the temperature compensation rod. The input (or output) section is shifted to compensate for wavelength drift with temperature. Such as figure 1 As shown, the AWG chip is divided into two parts, the chip mobile end 301 and the chip fixed end 302, which are respectively fixed on the base mobile end 201 and the base fixed end 202. The first driver 110 has a The fixed end 202 has different coe...

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Problems solved by technology

Therefore use figure 1 After the compensation method shown is a linear complete compensation for the temperature characteristic of the wavelength of the AWG chip, the temperature-wavelength characteristic of the AWG chip is as follows: figure 2 In the quadratic parabolic curve shown, the wavelength changes slightly in the temperature range of 0-40 degrees, but in the low temperature and high temperature regions, the wavelength changes drastically with temperature. In the temperature range of -40 degrees to 80 degrees, the wavelength changes with temperature. 60pm, so figure 1 This compensation method shown cannot be adapted for use over a wider temperature range

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