343nm Solid State Laser Passively Q-switched UV Laser

343nm Solid State Laser Passively Q-switched UV Laser.

343nm Solid State Laser Passively Q-switched UV Laseris made features of ultra compact, long lifetime, cost -effectiveness and easy operating, which is widely used in UV curing, micro-electronics, CD carving, laser medical treatment, scientific experiment, etc.

Download 343nm Laser Datasheet

Wavelength (nm): 343±1
Operating mode: Passively
Max average power (mW): 1‑50
Single pulse energy (μJ): 0.1‑7
Pulse duration (ns): ~7
Peak power (kW): 0.01‑1
Rep. rate (kHz): 4‑8
Ave power stability (over 4 hours): <5%, <3%
Transverse mode: Near TEM₀₀
M²: <2.0
Beam diameter at the aperture (mm): ~1.0
Polarization ratio: >50:1, Horizontal (Vertical optional)
Warm‑up time (minutes): <5
Beam height from base plate (mm): 70
Operating temperature (°C): 10‑35
Power supply (100‑240VAC): PSU‑Q‑FDA/PSU‑Q‑LED
Expected lifetime (hours): >10000

Understanding Q-Switched Lasers

Q-switching produces high-energy pulses by temporarily increasing cavity losses to prevent lasing, allowing population inversion in the gain medium to build until saturation. When the Q-switch is “opened,” cavity losses drop, releasing stored energy in a rapid, high-peak-power pulse (100 ps to 10 ns). Active and passive Q-switching methods achieve this effect differently, each suited to specific applications based on cost, size, triggering, and pulse energy requirements.

Passive vs. Active Q-Switch: Key Technologies

Q-switched lasers are categorized into active and passive types, each leveraging distinct mechanisms to control cavity losses and generate pulses.

Active Q-Switching: Precision Control for Pulsed Lasers

Active Q-switching uses external mechanisms, like acousto-optic or electro-optic modulators, to rapidly adjust cavity losses. For example, an acousto-optic modulator creates a grating when activated, deflecting spontaneously emitted photons out of the laser cavity to prevent lasing. When deactivated, it allows photons to pass, initiating stimulated emission and producing a high-energy pulse.

Key Aspect

This method offers precise control over pulse timing and repetition rates, ideal for applications requiring synchronization, such as laser-induced breakdown spectroscopy (LIBS) or kinematic laser machining.