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.
RIN characteristics in a frequency stabilized MSL were experimentally and theoretically investigated. Average RIN level of less than -150 dB/Hz as well as Modal RIN reduction of approximately 3 dB were obtained from the frequency stabilized MSL.
Stimulated-Brillouin-Scattering (SBS) provides passive Q-switching of a Nd:YAG-laser. Mode-coupling was actively supported by an AOM. Numerical simulations based on spectrally resolved rate equations including SBS-Stokes-shift and mode-locking explain special spectral features of this laser.
Powerful ultrashort pulses are generated using a hybrid MOPA consisting of a passively mode-locked semiconductor laser and a Yb-doped fiber amplifier. Pulses 2 ps in duration are amplified to an average power of 0.8 W.
Two types of supermode noise, uncorrelated and correlated, are demonstrated for two different types of harmonically modelocked lasers. The correlated supermode noise is originated from the excitation of multiple correlated optical supermodes.
We realized a wavelength-tunable mode-locked fiber laser using intracavity dispersion. Continuous tuning over 100 nm was obtained at a sweep rate of 20 kHz. Discrete tuning was achieved over 39 nm by inserting a FFPI into the cavity.
The development of high finesse resonators for broadband frequency combs enabled the extension of the versatile frequency comb technique into the extreme ultraviolet with all its implications. We describe new developments in this field.
We have investigated erbium-doped fs-fiber-lasers for applications in optical frequency metrology and find agreement of the measured frequency to within 2 times 10-17. The stability of a reference laser is transferred to a free-running fiber-laser at 1543 nm.
We demonstrate line-by-line pulse shaping control for optical arbitrary waveform generation (O-AWG). Independent manipulation of individual spectral lines from a mode-locked frequency comb leads to synthesis of user-specified ultrafast optical waveforms with unprecedented frequency resolution.
The development of a high-power diode-pumped continuous-wave Yb:KGW laser is reported. The laser delivered 6 W of average power at 1049 nm and was tunable between 1035 and 1076 nm with more than 1.3 W of output power.
We study the characteristics of ground-state and excite-state mode-locked pulse trains generated from an external cavity quantum dot mode-locked laser.
Active mode-locking of a near degenerate (~1064 nm) doubly resonant periodically poled LiNbO3 OPO pumped at 532 nm is reported. Pulse durations as short as 700 ps are observed.
We demonstrate an extreme chirped pulse modelocked laser, simultaneously generating near-transform-limited 3.9 ps optical pulses and 510 ps linearly chirped output. The design overcomes fundamental limitations of energy extraction and nonlinearities induced by gain dynamics.
2.35 mum GaSb-based diode lasers with QW compressive strains of 1.2 and 1.7% were designed and fabricated. Devices with heavily strained active region exhibit three times higher differential gain and half the threshold current.
The following topics are dealt with: The following topics are dealt with: exotic nonlinear optical phenomena; periodically poled materials; nonlinear processes in microstructured fiber; grating feedback lasers; instrumentation and diagnostics; optical frequency metrology; mode-locked sources; cellular sensing; molecular sensing; terahertz plasmons; metamaterials; optical signal processing; waveguides...
Widely wavelength-tunable ultrashort pulses are generated using passively modelocked Yb-doped fiber laser and photonic crystal fiber. Soliton and anti-stokes pulses are generated in wavelength region of 1.0-1.7 mum and 0.6-0.7 mum, respectively.
Mapping of the degree of spatial coherence among the elements of VCSEL-based photonic crystal homo- and hetero-structures reveals details of the phase locking not available from conventional far-field diffraction patterns.
We discuss carefully characterized semiconductor disk lasers with high spatial and spectral homogeneity, exhibiting 23% conversion efficiency and a 540-mW output power for cw operation. Passive mode-locking with 1.5-ps pulse duration is also demonstrated.
Using an anomalously dispersive microstructure fiber and two different saturable absorber mirrors at 1.06 mum, we demonstrate soliton-like 180-fs pulses in addition to 400-fs pulses with up to 0.1 nJ energy using only intra-fiber dispersion compensation.
An optically integrated frequency-comb-system based on a passively-mode locked, fCEO-locked Er:soft-glass-fiber-laser and a PPLN-waveguide phase-sensor is demonstrated. The oscillator emits pulses with 61 nm spectral bandwidth and 170 MHz repetition frequency.
We report broadband quantum cascade lasers emitting over a range of 6 to 8 mum at 77 K and having Jth=4.6 kA/cm2 at 300 K. Superluminescent diodes utilizing the same design will also be described.
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.