Frequency difference lock-in phenomenon's weakening by transverse magnetic field in Y-shaped ca

• 作 者: 肖光宗 张斌 汪之国 傅杨颖 龚梦帆
• 机 构: College of Optoelectronic Science and Engineering,National University of Defense Technology,
• 出 处: Chinese Optics Letters
• 发表日期: 2015年11期
• 关键词: weakening shaped transverse cube utilized tuned uniformity lasing polarized chos

We report experimental progress in weakening the frequency difference lock-in phenomenon in a Y-shaped cavity dual-frequency laser. A cube coil pair is chosen to provide a uniform magnetic field for tunability and uniformity of magnetic field strength. When the transverse magnetic field intensity is 9 m T, the frequency difference lock-in phenomenon is evidently weakened and the frequency difference can be continuously tuned in the range of0.12 MHz to 1.15 GHz. Moreover, the relationship between the minimal frequency difference and magnetic field intensity are investigated and discussed. Then a Y-shaped cavity dual-frequency laser is expected to be utilized as an optimum light source for heterodyne interferometric sensing and precise laser measurement.

We report experimental progress in weakening the frequency difference lock-in phenomenon in a Y-shaped cavity dual-frequency laser. A cube coil pair is chosen to provide a uniform magnetic field for tunability and uniformity of magnetic field strength. When the transverse magnetic field intensity is 9 m T, the frequency difference lock-in phenomenon is evidently weakened and the frequency difference can be continuously tuned in the range of 0.12 MHz to 1.15 GHz. Moreover, the relationship between the minimum frequency difference and magnetic field intensity are Then discussed. Then a Y-shaped cavity dual-frequency laser is expected to be utilized as an optimum light source for heterodyne interferometric sensing and precise laser measurement.