A 1.62‐W passively Q‐switch Tm³⁺‐doped laser with a Bi₂O₂Se saturable absorber

Abstract

A saturable absorber based on a novel two-dimensional (2D) material Bi 2 O 2 Se was placed in a resonator with an overall longest diameter of 31 mm to achieve efficient operation of a passively Q-switched (PQS) Tm:YAP laser for the first time. In PQS mode, a 1.62-W average output power with a pulse width of 1.24 µs and a pulse repetition of frequency of 112.1 kHz was achieved at the pump power of 22.2 W, corresponding to a peak power of 11.66 W. As a novel 2D material, the results show the potential of Bi 2 O 2 Se as a photomodulator in the 2 µm spectral range.

A high-performance passively Q-switched Tm:YAP laser with a TaSe2 saturable absorber

“…Passively Qswitched (PQS) technology is an effective method to realize pulsed lasers at 2 µm range due to its advances in simplicity, high efficiency, compactness, ease of adjustment and * Authors to whom any correspondence should be addressed. so on; and many microsecond (µs) or nanosecond (ns) lasers have been demonstrated in the experiment [8]. Therefore, some new modulators for PQS technology have been explored to increase the output performance of 2 µm pulsed lasers [9].…”

The Q‐switching performance of BP/SnSe2 heterojunction saturable absorber in Er‐doped fiber laser

“…7 Recently, a series of new two-dimensional (2D) nanomaterials have been used as SAs to generate pulsed lasers due to their excellent nonlinear absorption effect, short response time, and wide absorption bandwidth. [8][9][10][11][12][13][14][15] However, single materials still have some shortcomings. Graphene has weak optical absorption; the preparation process of transition metal dichalcogenides (TMDs) is complex; topological insulator has a gapless surface state.…”

“…Recently, a series of new two‐dimensional (2D) nanomaterials have been used as SAs to generate pulsed lasers due to their excellent nonlinear absorption effect, short response time, and wide absorption bandwidth 8–15 . However, single materials still have some shortcomings.…”