Patent ID: 8731341

Claim:
A signal identifying apparatus for an optical fiber, the apparatus comprising: a plunger which bends an optical fiber; a detecting portion which detects optical signal parameters from the optical fiber; and a mechanism which moves the plunger in a direction towards the detecting portion to bend the optical fiber; wherein the plunger comprises a first portion having a first bend radius and a second portion having a second bend radius larger than the first bend radius; and wherein the plunger is a flippable two-side plunger repositionable in the apparatus, and when the plunger has a first position in the apparatus, the plunger is configured to bend an optical fiber with the first portion having a first bend radius; when the plunger has a second position, flipped with respect to the first position, the plunger is configured to bend an optical fiber with the second portion having a second bend radius.