The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Rapidly tunable, high-repetition-rate picosecond near-infrared (near-IR) optical parametric oscillators (OPOs) are of great interest for applications such as Coherent Anti-Stokes Raman Scattering microscopy [1]. Such OPOs, typically pumped in the green, pose major challenges in terms of the material damage threshold while operating at high power in combination with high repetition rates, making the...
We present a comparative study on frequency-doubling characteristics of femtosecond laser pulses in thick nonlinear crystals with different temporal and spatial walk-off parameters. Using single-pass second harmonic generation (SHG) of 260 fs pulses at 1064 nm from a high-average-power femtosecond Yb-fiber laser in 5-mm-long crystals of β-BaB 2O4 (BBO) and BiB3O6 (BIBO), we find that for comparable...
We report a deep-mid-IR femtosecond OPO based on CdSiP2 using direct synchronous pumping by a Ti:sapphire laser, providing continuous wavelength coverage across 6–8 μm under rapid static cavity delay tuning with high output stability.
We report a cw mid-infrared source based on OP-GaAs, tunable across 6460–7517nm, providing 51.1mW at 6790nm, with passive power stability of ∼2.3% rms (>1 hour) and frequency stability of 1.8GHz (>1 minute), in high-beam quality.
We report phase-modulation mode-locking of a continuous-wave (cw) singly- resonant optical parametric oscillator (OPO) in the near- and mid-infrared based on MgO-doped periodically poled $\hbox{LiNbO}_{3} $ (MgO:PPLN) and pumped by an Yb-fiber laser at 1064 nm. By investigating the spectral output and pulse formation characteristics of the OPO, we observe a clear transition from an unstable spectrum...
We report a broadband mid-IR femtosecond OPO tunable across 2179–3732 nm, pumped by 20-fs pulses at 790 nm, generating idler pulses of 4.3 optical cycles (33 fs) at 2282 nm, with high stability and beam-quality.
We report pulse formation and spectral characteristics of a FM mode-locked OPO in the mid-IR. The singly-resonant OPO based on MgO:PPLN, pumped by a cw Yb-fiber laser at 1064 nm, generates 236ps pulses at 80MHz.
High-power ultrashort laser pulses in the green are of great interest for a variety of technological and scientific applications [1], including pumping ultrafast optical parametric oscillators [2]. In the absence of suitable laser gain media, the development of high-power green sources over the past 50 years has relied almost exclusively on second harmonic generation (SHG) using various nonlinear...
We report active mode-locking of a continuous-wave optical parametric oscillator in doubly- and singly-resonant configuration using direct low-frequency electro-optic phasemodulation, generating 533ps and 230ps pulses at 80MHz, respectively.
We report a compact, efficient, 1.5 mJ, 450 MHz, mid-IR picosecond OPO based on CdSiP2, synchronously-pumped at 1064 nm, covering the technologically important wavelength range of 6091–6577 nm for surgical applications.
We report a novel architecture for cw OPOs based on antiresonant ring interferometric cavity coupling, providing two pairs of signal/idler waves with independent tuning and arbitrarily close wavelength separation.
We demonstrate a tunable picosecond source providing up to 3.5 W over 752–860 nm, with a power stability of 1.6% rms over 14 hours using intracavity frequency-doubling in optical-parametric-oscillator synchronously pumped by a Yb-fiber laser.
We report a novel generic design for cw singly-resonant-parametric-oscillators(SROs) based on two crystals, providing two signal waves with arbitrary tuning from the same cavity. Using this source we generate two distinct wavelengths with frequency difference 0.556THz.
We report the first operation of a Ti:sapphire laser pumped by fiber laser. Using a high-power, cw, frequency-doubled Yb-fiber source at 532nm, continuous-wave operation over 806–970nm with output power >1.1W in TEM00 spatial beam is demonstrated.
We report a 13-W, single-frequency, cw green source at 532nm in a TEM00 spatial profile based on simple single-pass SHG of a fiber laser with conversion efficiency as high as 55% using a double-crystal scheme.
We present a broadband, high-power, fiber-laser-pumped, continuous-wave optical parametric oscillator for mid-infrared by exploiting extended phase-matching properties of MgO:PPLN. Total powers of 11.3W, with 5.3W broadband mid-infrared idler in excellent beam quality are generated.
Using the out-coupling approach, an output power of up to 16.6 W (8.3 W of signal and 8.3 W of idler) from a cw singly-resonant optical parametric oscillator (SRO) for 26.8 W of pump power at an extraction efficiency to 62% is generated . The device is based on an Yb fiber laser pump, resulting in a highly compact, practical, and portable design. The Yb fiber pump laser delivers up to 30 W of single-frequency...
Continuous-wave (cw) singly-resonant optical parametric oscillators (SROs) represent versatile sources of widely tunable, high-power, single-frequency radiation in spectral regions inaccessible to lasers. Pumped at 1.064 mum, PPLN cw SROs can cover the 1-5 mum spectral range, but access to wavelengths <1mum is precluded by photorefractive damage in PPLN. Due to its large photorefractive damage...
We report a dispersion compensated 1-GHz femtosecond optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser using a cavity longer than the fundamental synchronous cavity length with improved output power and near-transform-limit pulses.
We describe a compact, high-power, cw green source based on single-pass SHG of a Yb-fiber laser in MgO:sPPLT, providing 7.58 W, single-frequency output at 532 nm in TEMoo profile(M2<1.29) with peak-to-peak power stability of 9% over 13 h.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.