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How a Compact Femtosecond Laser Pushes TAS Differential Signals Into the 10⁻⁴ ΔA Regime
Y-LASER is pleased to introduce the HELIOS-20W-HP compact femtosecond laser, purpose-engineered as a shared source for Transient Absorption Spectroscopy, pump-probe platforms, and TR-PL experiments. With factory-validated 50 / 100 / 200 kHz operation plus a 25 kHz add-on working point, HELIOS-20W-HP delivers 21.8 W / 434 µJ at 50 kHz, sub-190 fs pulse duration, 0.07% RMS power stability over 24 hours, 4.56 µrad pointing stability, M² < 1.11, and 1000:1 pre-pulse contrast. These parameters directly address the stability, overlap, beam quality, and contrast requirements that determine whether weak TAS signals can be resolved in the 10⁻⁴ ΔA regime. One compact Yb-CPA laser, one shared source, multiple ultrafast spectroscopy workflows.
mJ-Class Femtosecond + OPA + MPC Sub-50 fs - Three Units Solving Two Physical Constraints
Y-LASER is pleased to introduce a three-unit femtosecond platform combining the HELIOS-25W-HE high-energy Yb-CPA laser, AURORA-H-HP OPA, and HYPERION-S MPC post-compressor on one optical bench. This integrated chain solves two key constraints in ultrafast spectroscopy: wavelength tunability and sub-50 fs time resolution. The system delivers 650–2600 nm tunable femtosecond output, 12.75% Signal peak efficiency, 6.85% Idler peak efficiency, 19.33% total peak conversion, and compresses the pulse from 248 fs to 40.7 fs with 89.38% throughput. With 0.049% RMS main-laser stability, 0.62% RMS OPA stability, and 0.437% RMS MPC stability over 24 hours, the platform provides a stable, high-performance source for TA pump-probe, TMD excitonic dynamics, photochemistry, hot-carrier thermalization, strong-field THz, HHG, and attosecond front-end applications.
40 W Main Oscillator + OPA + SHG + DFG - Five Units, One Bench, 315 nm – 16 μm
Y-LASER is pleased to introduce a five-unit femtosecond mid-IR platform combining the HELIOS-40W-HP Yb main oscillator, AURORA-HE OPA, standalone SHG stage, DFG1, and DFG2 on one optical bench. Driven by a 44.2 W, 100 kHz Yb-CPA source, the system delivers continuous wavelength coverage from 315 nm to 16 μm across UV, visible, NIR, SWIR, MIR, and LWIR regions. With 10.4% Signal peak efficiency, 6.4% Idler peak efficiency, 3.6% SHS peak efficiency, 5.3% DFG1 peak efficiency, and far-mid-IR output reaching 16 μm, this platform provides a powerful and integrated source for femtosecond mid-IR spectroscopy, TA-MIR, transient vibrational spectroscopy, VSFG, biomolecular fingerprint-region studies, catalytic-intermediate dynamics, and UV-Vis pump-probe research.
40 W Main Oscillator + OPA + SHG + THG - Four Units, One Bench, 210 – 2930 nm
Y-LASER is pleased to introduce a high-power tunable femtosecond platform combining the HELIOS-40W-HP Yb main oscillator, AURORA-HP OPA, standalone SHG stage, and standalone THG stage on one optical bench. Driven by a 44 W, 100 kHz Yb-CPA source, this four-unit system delivers continuous wavelength coverage from 210 to 2930 nm across DUV, UV, visible, NIR, and SWIR bands. With 11.6% Signal peak efficiency, 8.72% Idler peak efficiency, 3.07% SHS peak efficiency, 0.72% THS peak efficiency, and 0.2451% RMS OPA stability over 24 hours, the platform provides a powerful and stable source for DUV ultrafast spectroscopy, UV-Vis TA, pump-probe experiments, photochemistry, biological spectroscopy, and SWIR ultrafast research.
One OPA + One SHG ：Six Frequency Octaves from 315 to 2820 nm
Y-LASER is pleased to introduce the AURORA-HP + AU/SHG high-energy tunable femtosecond source, an integrated OPA + SHG platform that translates a fixed 1030 nm Yb output into continuous wavelength coverage from 315 to 2820 nm. With Signal tuning from 630 to 1030 nm, Idler tuning from 1030 to 2820 nm, SHG extension into 315–630 nm, 9.88% Signal peak efficiency, 4.85% Idler peak efficiency, 2.66% SHS peak efficiency, and 0.84% RMS power stability over 24 hours, the system provides a flexible and stable source for UV-Vis TA, Vis-NIR pump-probe, SWIR ultrafast spectroscopy, photochemistry, biological chromophore dynamics, and deep-UV ultrafast research.
Femtosecond Lasers and Ultrafast Spectroscopy — Optical Parametric Amplifiers (OPAs): Giving a 1030 nm Yb Master "Any Color It Needs"
Y-LASER is pleased to share a new delivery of a high-repetition-rate few-cycle femtosecond source: the HELIOS-40W-HP high-power Yb femtosecond master laser integrated with the HYPERION-G-HE multi-pass cell post-compressor. Starting from 43.8 W, 217.5 fs, and 438 µJ at 100 kHz, the system compresses the pulse to 36.2 fs while delivering 38 W average power, 380 µJ pulse energy, 95% transmission, 10.5 GW peak power, and 0.064% RMS stability over 24 hours. This Yb + MPC platform provides a stable and scalable driver for high-harmonic generation, EUV/VUV coherent sources, attosecond science, TR-ARPES, strong-field physics, and ultrafast electron diffraction.
Room-Temperature THz Source Breaks 0.4 % Conversion Efficiency in LiNbO₃--Y-LASER HELIOS-20W-HE Enables mJ-Class Short-Pulse Pumping at 10 kHz
Record 0.4% THz conversion efficiency & 51.7 mW average power — achieved by BUAA's Prof. Xiaojun Wu team using the HELIOS-20W-HE as the stable pump source (2 mJ / 226 fs / 10 kHz / 0.12% RMS over 24h), with AURORA-H-HP OPA delivering the <55 fs EOS probe (650–2600 nm tuning) and HYPERION-G MPC enabling 249 fs → 33.4 fs compression at 93% throughput. The reflective echelon route decisively outperforms gratings under short-pulse, mJ-class conditions — a systematic benchmark that moves strong-field THz from lab bottleneck toward engineering deployment.
Femtosecond Lasers and High-Repetition-Rate Few-Cycle Sources
Y-LASER is pleased to share a new delivery of a high-repetition-rate few-cycle femtosecond source: the HELIOS-40W-HP high-power Yb femtosecond master laser integrated with the HYPERION-G-HE multi-pass cell post-compressor. Starting from 43.8 W, 217.5 fs, and 438 µJ at 100 kHz, the system compresses the pulse to 36.2 fs while delivering 38 W average power, 380 µJ pulse energy, 95% transmission, 10.5 GW peak power, and 0.064% RMS stability over 24 hours. This Yb + MPC platform provides a stable and scalable driver for high-harmonic generation, EUV/VUV coherent sources, attosecond science, TR-ARPES, strong-field physics, and ultrafast electron diffraction.
Femtosecond Lasers and Tunable Ultrafast Spectroscopy
Y-LASER is pleased to share a new delivery of the HELIOS-20W-HE femtosecond master laser integrated with the AURORA-HE OPA and SHG module. The system provides continuously tunable femtosecond output from 315 to 2600 nm, with 2.16 mJ pulse energy, 230.5 fs pulse duration, 0.145% RMS master-laser stability over 24 hours, 9.2% peak Signal conversion, 5.76% peak Idler conversion, and 0.6623% RMS OPA stability over 24 hours. One integrated platform now supports UV-Vis transient absorption, NIR and SWIR ultrafast spectroscopy, perovskite and 2D-material studies, organic photovoltaics, and high-repetition-rate material screening on a single optical bench.