Various systems and methods for temperature measurement are disclosed. The method includes receiving an oscillatory signal at an inductance-capacitance-resistance circuit. The hinge also may be configured to not release when an opening torque is applied when the hinged member is in its open position even when the opening torque is greater than the release torque. The first electrode is electrically coupled with the first type semiconductor layer through the opening. Therefore, the fiber laser system can provide 3-\u03bcm laser light and have high light pumping efficiency and high output power.