A 3-kHz Er:YAG single-frequency laser with a‘triple-reflection’configuration on a piezoelectric actuator

A novel Er:YAG laser system operating at 1645 nm with high pulse-repetition-frequency(PRF)of kHz level is demonstrated.A ring cavity with double gain medium end-pumped by two fiber lasers is utilized to obtain high pulse energy.A novel‘triple-reflection’configuration on a piezoelectric actuator(PZT)is adopted to achieve high-repetition-rate at 3-kHz operation with the ramp-fire locking method.Single frequency pulses with maximum average power of 18.3 W at 3 kHz are obtained,and the pulse duration time is 318 ns.The full line width at half maximum(FWHM)of the pulses measured by the heterodyne technique is 1.71 MHz at 3 kHz.To the best of our knowledge,this is the highest PRF single-frequency laser pulses achieved based Er:YAG gain medium.

Laser diode pumped high-energy single-frequency Er:YAG laser with hundreds of nanoseconds pulse duration

We demonstrated a high-energy single-frequency erbium-doped yttrium aluminum garnet(Er:YAG)laser.With1470 nm laser diodes(LDs)as pumping sources,single-frequency laser pulses with energy of 28.6 m J,21.6 m J,and 15.0 m J are obtained at pulse repetition frequency of 200 Hz,300 Hz,and 500 Hz,respectively.As far as we know,this is the highest single-frequency pulse energy with the Er:YAG gain medium.With the ring cavity design,pulse duration is maintained at hundreds of nanoseconds.This high-energy single-frequency laser with hundreds of nanoseconds pulse duration is a prospective laser source for light detection and ranging applications.

1 kHz single-frequency, injection-seeded Er:YAG laser with an optical feedback

A novel 1 kHz single-frequency, Q-switched Er-doped yttrium aluminum garnet(Er:YAG) laser pumped by a 1470 nm laser diode is demonstrated. The 500 ns, 5.52 mJ single-frequency, diffraction-limited pulses are obtained by using a ‘ramp-fire' injection-seeding technique and an optical feedback architecture. The full width at half-maximum of the pulse spectrum is measured to be 1.47 MHz by using the heterodyne technique. The beam quality M2 factors are measured to be 1.18 and 1.24 in the x and y directions, respectively.

Resonantly pumped 1645 nm Q-switched Er：YAG laser with a ring cavity

这份纸报告 1645 nm 嗯: 在 1532 nm 操作的嗯纤维激光共鸣地抽的钇铝柘榴石激光。有 52% 的斜坡效率的 1.78W continous 波浪(CW ) 产量力量用一个长戒指洞和做的 1 at.% 被获得嗯: 钇铝柘榴石水晶。在切换 Q 的模式，获得的脉搏精力是以 500 Hz 的重复率的 1.6 mJ；为 1 kHz 重复率， 1.2 mJ 产量精力被获得。