Patent ID: 9341784
Filing Date: 2016-05-17
CPC Classification: G02B,Y10T

Claim Text:
1. An optical fiber filter device, comprising: a first fiber pigtail assembly and a second fiber pigtail assembly, the first fiber pigtail assembly comprising a first optical fiber and a first fiber accommodating member which accommodates the first optical fiber, the second fiber pigtail assembly comprising a second optical fiber and a second fiber accommodating member which accommodates the second optical fiber, the first optical fiber having a first port and the second optical fiber having a second port; and a first optical filtering element and a second optical filtering element, which each transmit a light within a first wavelength range and reflect a light within a second wavelength range, wherein the first optical filtering element is arranged between the first port and the second port and is inclined at an angle to an optical axis of the first optical fiber such that a light component within the first wavelength range emitted from the first port is transmitted through the first optical filtering element and enters the second optical fiber via the second port, and a light component within the second wavelength range emitted from the first port is reflected by the first optical filtering element to form a reflected light, and wherein the second optical filtering element is arranged in an optical path of the reflected light such that the reflected light returns to the first optical fiber via the first port after it has been reflected by the first and second optical filtering elements wherein the first and the second optical filtering element are located on the first and/or the second port and/or on the first and/or the second fiber accommodating member.