Fiber lasers use rare earth doped fiber as the active medium, with laser diodes as the pump source, which inherently has some key advantages, making them in the mold through the generation of ultra-short pulse is quite attractive. The high gain bandwidth and efficiency of doped fibers allows the manufacture of relatively inexpensive, compact, rugged fiber 3w green laser systems that provide a wide range of fiber-coupled output beams for a wide range of applications.

The fiber provides a high surface area-to-volume ratio, which enables efficient cooling and can be customized according to specific performance parameters. Fiber lasers are initially limited to continuous (CW), low power, single mode operation. After more than 30 years of development, fiber lasers have been able to achieve single mode and multimode operation. The wavelength range covers UV (UV) to far infrared (Far-IR) band, and can provide a very high power level, variable repetition frequency, and (perhaps the most significant) millisecond to femtosecond pulse width.

300mw laser pointer

Unlike traditional free-space lasers, fiber lasers use fiber and fiber Bragg gratings (FBG), which replace conventional dielectric mirrors for optical feedback. Most high-power fiber keychain laser pointer use a double-clad fiber architecture, where the gain medium is in the fiber core, surrounded by two layers of cladding. A multimode pump beam from a laser diode or another fiber laser propagates in the inner cladding and is constrained by the outer cladding to excite the active medium and produce a lasing pattern that propagates in the fiber core.

In order to produce ultrafast laser pulses, active or passive mode-locking techniques are required. Some of the techniques used today for passive clamping include nonlinear polarization rotation and saturation absorption techniques, while electro-optic or acousto-optic modulators are used for active mode-locking. In semiconductor saturable absorber (SESAM), semiconductor quantum wells grow on semiconductor distributed Bragg reflectors, SESAM has been successfully used in the manufacture of 1.0μm and 1.5μm wavelength femtosecond fiber burning laser. The use of erbium-doped (Er) fiber lasers using graphene saturable absorbers has shown self-starting mode-locked and stable soliton pulses. These are just a few femtosecond fiber laser architectures that commercial lasers are using to meet a variety of scientific and industrial applications.

Based on its fiber chirped pulse amplification (FCPA) technology, the ICPA America FCPA μJewel series consists of yttrium-doped fiber lasers with sufficient pulse energy, even at 1045 nm. The FCPA architecture allows the user to choose between two modes: 100kHz or 200kHz repetition frequency, up to 50μJ high energy mode; and 1MHz under 10W and 20W high average power mode. This option allows the user to process the material at a faster rate depending on the application requirements. IMRA's Raman frequency shift technology allows the erbium-doped Raman-shifted femtosecond fiber most powerful laser pointer to produce clean pulse shapes and spectra at 810nm wavelengths, enabling Femtolite fiber lasers to replace titanium sapphire (Ti: sapphire) This type of laser has been the main force in clinical and industrial femtosecond applications. At 810nm and 1620nm wavelengths, Femtolite's power range covers 150 ~ 200mW, which is very useful in terahertz wave generation and detection, multi-photon fluorescence microscopy, and second harmonic imaging.

The fiber laser family of Fianium (acquired by NKT Photonics Inc. in early 2016) is based on the main oscillation power amplifier (MOPA) construction module to produce a mode-locked Gatling laser pointer source that outputs picosecond or femtosecond optical pulses. Fianium offers high average power (> 20W) and high energy systems capable of repeating frequencies from milliseconds to single-shot operation with a spectral range of 240-2500nm.

These femtosecond selectable ranges from 400fs to 600fs with repetition rates up to 3MHz. IPG's CLPF ultrafast oscillators provide 40fs pulses and provide custom-selectable wavelengths in the range of 2.1 to 2.6μm with repetition rates of 80 to 800MHz and output powers of 2W The IPG's ultra-fast amplifiers provide the ability to achieve a few watts of output power over a spectral range of 2 to 3 μm. Kerr Lens-mode-locked oscillators and ultra-fast amplifiers are pumped by IPG's continuous fiber lasers to meet the needs of a range of scientific and biomedical applications.

All femtosecond fiber green astronomy laser manufacturers continue to improve the performance of ultrafast architectures, including a wider wavelength range, shorter pulses and more power output options to meet the challenges of next-generation materials research and processing.