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Single Pass DFG Fiber Laser
Erbium group offers a single pass SDFG fiber laser (FL-SDFG), which uses ultra narrow linewidth fiber DFB laser as seeds, all fiber amplifiers to boost the output power and single pass PPLN DFG module to get high power mid-infrared laser output. The DFG fiber laser could cover the output wavelengths from 2400 to 4000 nm, with narrow linewidth (less than 200 kHz in 100 us integration time) and excellent beam quality (M² <1.1). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration, which is great for frequency locking.
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Photonic Crystal Fiber
Our polarization-maintaining single-mode fibers, which are optimized to exhibit low loss while keeping an almost constant mode field diameter.
The fiber is endlessly single-mode (i.e. it has no higher order mode cut-off) and delivers excellent mode quality at all wavelengths.
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Distributed Feedback Single Frequency Fiber Laser
Low-Linewidth, Low-Noise, No Mode-Hopping, Wavelength Tunable, Linear-Polarization
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Frequency hopping 589 nm fiber frequency doubling laser
A fast frequency hopping Raman fiber single-pass frequency doubling laser (RFA-SSHGJF) was developed by Erbium group to meet the demand of sodium lidar for frequency converted of 589 nm laser. Adopting ultra-narrow linewidth ECDL as seed source, Utilizing high speed modulator for frequency hopping, adopting all-fiber Raman amplifier for enhancing laser power and single passing periodic polarization crystal, Erbium group obtains the high power frequency doubling laser with frequency hopping. This product can achieve two 589 nm laser outputs. One is used to lock the laser to the sodium atomic absorption line at a constant frequency. The other laser support f+ 630MHz, F +0 MHz, F-630mhz fast switching. The laser power can reach more than 1.8 W, which perfectly matches the demand of sodium lidar seed source.
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External Resonant SHG Fiber Laser
Erbium group offers external resonant SHG fiber laser FL-RSHG, which uses ultra-narrow linewidth fiber DFB laser as seed, all fiber amplifiers to boost the output power and external resonant SHG cavity to get high power visible or UV lasers. The output laser wavelengths cover from 253 to 795 nm with a SHG efficiency of up to 80% and output power of up to 30W. The product has the properties of high output power, optional narrower linewidth (less than 20 kHz in 100 us integration time), tunable and optional low relative intensity noise.
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Isolator Series
Erbium group Isolator Series are designed for guarding the laser from back reflected light. The isolator normally rotate the polarized plane for 45° clockwise in the forward direction, an λ/2 waveplate is in option if other output polarization is preferred. The high transmission efficiency, high isolation, high power handling ability and large aperture features make it flexible to fit different applications in laser protection.
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High power single frequency Er-doped fiber laser
The erbium-doped single-frequency fiber amplifier can be divided into two versions according to different output power. The low-power version has a maximum output power of 15W with extremely low noise and RIN below -140 dBc/Hz (100 kHz).
The high power version has a maximum output of 40W. It can be used for remote interferometry, coherent communication, and atomic physics after frequency doubling. The amplifier remains modehopping-free and stable under wide temperature variation and high mechanical vibration, which is great for frequency locking. The fiber laser is an optimal solution for applications in outdoor harsh conditions.
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Mid-infrared single-frequency fiber laser
Erbium group develop the all-fiber single-pass differential frequency laser (FA-SDFG) extend the wavelength to Mid-infrared range. FA-SDFG series use ultra-narrow linewidth DFB as the seed source. All-fiber amplifier amplify the laser power. The periodic polarization crystal is adopted for producing the high power differential frequency laser. The wavelength range of the FA-SDFG series cover 2.4-4.0 um. The laser has the characterizers of narrow laser line width (Lorentz linewidth <10kHz), no mode jump under a large range of temperature and vibration conditions, excellent laser beam quality (M² <1.2), high output power and low intensity noise.
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Frequency quadrupled Fiber Ultraviolet Laser
Erbium group offers high power, single-frequency tunable UV lasers from 250 to 400 nm, for applications in quantum sciences such as cold atoms, ultra-cold molecules, single-photon excitation of Rydberg atom and frequency standard. UV laser is obtained by combining an all-fiber amplifier seeded with an ultra-narrow linewidth laser, a single-pass frequency-doubling unit with PPLN crystal and a cascaded enhancement resonant cavity. These lasers has the characteristics of narrow linewidth, linear polarization and tunable. After active power control, the output power RMS of the laser is less than 1.0% within 3 hours.
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Er-doped Laser Amplifer(EFA)
When EFA developed by Erbium group amplifies the seed laser power, the increase of the frequency and intensity noise is kept in extreme low range. The linewidth is less than 10 Hz, and the intensity noise (RIN) is less than -140 dBc/ HZ@ 100 kHz. Compared to the scheme of directly power-amplified 780 nm diode laser, the scheme of utilizing Er-doped fiber amplifier (EFA) as 1560 nm laser amplifier adopted by Erbium group can get higher power. The maximum laser power outputted with stable and long lifetime by EFA can be up to 15 W. Due to all fiber structure, the EFA have excellent environmental stability.
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Single frequency Tm-doped fiber laser
Erbium group offers 1700-2050 nm Tm-doped fiber amplifier with innovative ASE suppression technique. Maximum output power reaches up to 40 W for single-frequency operation. The lasers have ultra-low intensity noise(RIN<0.05%, 10Hz-10MHz) and excellent beam quality (M² <1.15), which makes them ideal light sources for the applications like optical lattice, laser atom cooling and biomedical. The full protection system of the laser ensures long-term free of maintenance and long life time
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Yb-doped Continous Wave Fiber Laser
Erbium group offers a 976-1120 nm Ytterbium-doped fiber laser with innovative ASE suppression technology. Maximum output power reaches up to 1000 W. The lasers have excellent beam quality, all fiber configuration, wide emission wavelength, which
makes them ideal light sources for the applications like pumping sources for Yb, Ho, Er, Tm, Pr, Raman lasers and OPO.
