A novel low-cost

small-size

handheld pressure-controlled variable lens-based Variable Optical Attenuator（VOA） is designed and fabricated in this paper.With a cylindrical precision tube as the lens chamber sandwiched between an input fiber connector pin and an output-fiber connector pin with external thread

this device has a structure of input-fiber + variable lens + output-fiber.The manual procession of the spiral tube enables the occurrence of compression deformation of the liquid lens so as to achieve the adjustment of the lens focal length

thus controlling the efficiency of the light intensity coupled from the input-fiber to the output fiber and achieving the controllable adjustment of the light attenuation.The experimental results indicate that this VOA attenuates in the range of 3

6

0 dB and can be used for such occasions as experimental teaching.