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We show full frequency-stabilization of a GHz diode-pumped solid-state laser frequency comb. The CEO is stabilized via pump-current modulation. We present a thorough characterization of the comb in terms of noise and frequency stability.
Fully-stabilized optical frequency combs from modelocked lasers are a key component in various applications like optical frequency metrology, optical clocks or ultra-stable microwave generation. The traditional approach to stabilize the carrier-envelope offset (CEO) frequency /ceo in a diode-pumped modelocked laser is via a modulation of the pump current, i.e., by modulating the gain of the modelocked...
We show the first absolute optical frequency metrology demonstration performed with an OPO. The OPO frequency comb shows ∼300-mrad integrated CEO phase noise and ∼70-kHz optical linewidth at 1557-nm when fully-stabilized to a radio-frequency reference.
We report the first characterization of the CEO-frequency in a modelocked semiconductor laser, in terms of noise and modulation bandwidth, performed using a novel approach that does not require an octave-spanning spectrum and a self-referencing scheme.
An optical frequency comb spanning over 1540 nm to 1580 nm is generated from a Rb-stabilized frequency-doubled 1560-nm DFB laser. Frequency stability and accuracy as well as noise properties of the laser system are presented.
We present for the first time an investigation of the tuning and modulation properties of a quantum cascade laser with an integrated heater providing a new tuning mechanism. We also show the benefit for spectroscopy applications.
We compare the noise characteristics and cavity dynamics of a CEO-stabilized 80-fs Yb:CALGO SESAM-modelocked thin-disk-laser (TDL) and a 140-W SESAM-modelocked Yb:YAG TDL with CEO detection. Guidelines towards tight CEO-locking in the >100 W regime are presented.
Ultrafast thin disk lasers generate higher power levels than any other femtosecond oscillator technology. We review the current state of the art and give an outlook towards new applications such as intralaser extreme nonlinear optics.
Flicker noise was studied in a set of 20 QCLs at 7–8 µm, showing significant differences among the devices and the probable existence of various noise sources. Ridgewaveguide lasers showed lower noise than buried-heterostructures.
Quantum Cascade Lasers (QCLs) are considered as one of the most versatile sources of light in the mid-IR spectral range. The need for mid-IR lasers not only emitting at precisely selected wavelengths but showing also a high spectral purity is now growing, driven by numerous possible applications such as high-resolution spectroscopy in the molecular fingerprint region, e.g. in combination with optical...
Frequency noise and linewidth properties of different mid-infrared DFB-QCLs using buried-heterostructures and ridge waveguides are compared. The physical origin of frequency noise and the impact of the different lasers parameters are discussed.
We present the frequency noise and linewidth of a quantum cascade laser measured for the first time with the same device from cryogenic to room-temperature. A strong increase of the linewidth occurs at low temperature.
The frequency noise properties of free-running single-mode mid-IR Quantum Cascade Lasers (QCLs) operated near room-temperature in CW mode and emitting at 4.6 µm are presented. The frequency noise level measured in this paper is globally a factor of 100 lower than recently reported for a similar QCL but operated at cryogenic temperature. The results are very promising for the future realization of...
Narrow-linewidth lasers exhibiting a high spectral purity have important applications in various fields, such as high-resolution spectroscopy, coherent optical communications or time and frequency metrology, to name a few. With a proper feedback loop for linewidth reduction, such lasers can be used as ultra-stable reference for low phase noise microwave generation in frequency metrology. Since mid-infrared...
Following the demonstration of the first fully stabilized solid state laser frequency comb operating in the 1.5-µm spectral region [1,2], we present a detailed analysis of the noise properties of this comb and show its superior noise performances compared to a commercial fiber-laser comb stabilized using similar feedback electronics. Our comb is based on a ∼200-fs Er:Yb:glass laser oscillator (ERGO)...
Based on an extended-cavity diode laser locked to a high-finesse ultra-low thermal expansion Fabry-Perot cavity using the Pound-Drever-Hall (PDH) technique, we are developing an ultra-stable laser at 1.55 μm for the generation of low phase noise microwave. Our target short-term frequency instability is 10−15 at 1 s. The horizontally-mounted cavity has a resonance width of 8.1 kHz, experimentally determined...
Self-referenced optical frequency combs from femtosecond lasers have enabled impressive progress in numerous research areas such as precision metrology and high resolution spectroscopy. Frequency combs from Ti:Sapphire lasers are widely employed despite several disadvantages associated with their complexity and high costs. In this regard, the demonstration of carrier envelope offset (CEO) stabilized...
A sensor based on quartz enhanced photoacoustic spectroscopy was evaluated for the detection of trace levels of ethylene at atmospheric pressure using a fiber coupled DFB diode laser probing an absorption peak at 6177.15 cm-1.
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