Jonas Heidrich
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View article: Upconversion-pumped ultrafast 2.3-µm laser
Upconversion-pumped ultrafast 2.3-µm laser Open
View article: GaSb-based SESAM mode-locked femtosecond 2309-nm Tm:LiYF$_4$ laser
GaSb-based SESAM mode-locked femtosecond 2309-nm Tm:LiYF$_4$ laser Open
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View article: Upconversion-pumped femtosecond thulium laser at 2309 nm mode-locked by a GaSb-based SESAM
Upconversion-pumped femtosecond thulium laser at 2309 nm mode-locked by a GaSb-based SESAM Open
We report on a femtosecond thulium laser operating on the 3 H 4 → 3 H 5 transition with upconversion pumping around 1 µm and passively mode-locked by a GaSb-based SEmiconductor Saturable Absorber Mirror (SESAM). This laser employs a 6 at.%…
View article: Continuous-wave and SESAM mode-locked 2.3-µm Tm:LiYF<sub>4</sub> lasers: Upconversion pumping at 1.45 µm
Continuous-wave and SESAM mode-locked 2.3-µm Tm:LiYF<sub>4</sub> lasers: Upconversion pumping at 1.45 µm Open
A Tm:LiYF4 laser operating on the 3 H 4 → 3 H 5 transition with upconversion pumping at 1.45 µm generates 831 mW at 2313 nm with 34.0% slope efficiency. Mode-locked by a GaSb- based SESAM, it delivers 855-fs pulses at 104.4-MHz.
View article: Gigahertz semiconductor laser at a center wavelength of 2 µm in single and dual-comb operation
Gigahertz semiconductor laser at a center wavelength of 2 µm in single and dual-comb operation Open
Dual-comb lasers are a new class of ultrafast lasers that enable fast, accurate and sensitive measurements without any mechanical delay lines. Here, we demonstrate a 2-µm laser called MIXSEL (Modelocked Integrated eXternal-cavity Surface E…
View article: 3-W output power from a 2-µm InGaSb VECSEL using a hybrid metal-semiconductor Bragg reflector
3-W output power from a 2-µm InGaSb VECSEL using a hybrid metal-semiconductor Bragg reflector Open
We present improved thermal management of an optically-pumped vertical external cavity surface emitting laser (VECSEL) at a center wavelength of around 2 µm. This was achieved with a backside-cooled, InGaSb-based VECSEL using a hybrid meta…
View article: Single-cavity dual-modelocked 2.36-µm laser
Single-cavity dual-modelocked 2.36-µm laser Open
We present the first dual-modelocked femtosecond oscillator operating beyond 2 µm wavelength. This new class of laser is based on a Cr:ZnS gain medium, an InGaSb SESAM for modelocking, and a two-surface reflective device for spatial duplex…
View article: Low-Noise Femtosecond SESAM Modelocked Diode-Pumped Cr:ZnS Oscillator
Low-Noise Femtosecond SESAM Modelocked Diode-Pumped Cr:ZnS Oscillator Open
Cr-doped ZnS and ZnSe are excellent gain mediums for high power and broadband ultrashort pulse generation in the 2 – 3 μm wavelength range. SESAM modelocked Cr:ZnS oscillators have the advantage of reliable, self-starting passive modelocki…
View article: Bandgap engineering, monolithic growth, and operation parameters of GaSb-based SESAMs in the 2–2.4 µm range
Bandgap engineering, monolithic growth, and operation parameters of GaSb-based SESAMs in the 2–2.4 µm range Open
We present the detailed growth and characterization of novel GaSb-based semiconductor saturable absorber mirrors (SESAMs) operating in the 2–2.4 µm spectral range. These SESAMs at different wavelengths are bandgap engineered using ternary …
View article: 50-W average power Ho:YAG SESAM-modelocked thin-disk oscillator at 2.1 µm
50-W average power Ho:YAG SESAM-modelocked thin-disk oscillator at 2.1 µm Open
Ultrafast laser systems operating with high-average power in the wavelength range from 1.9 µm to 3 µm are of interest for a wide range of applications for example in spectroscopy, material processing and as drivers for secondary sources in…
View article: 50-W average power Ho:YAG SESAM-modelocked thin-disk oscillator at 2.1 um
50-W average power Ho:YAG SESAM-modelocked thin-disk oscillator at 2.1 um Open
Ultrafast laser systems operating with high-average power in the wavelength range from 1.9 um to 3 um are of interest for a wide range of applications for example in spectroscopy, material processing and as drivers for secondary sources in…
View article: 324-fs Pulses From a SESAM Modelocked Backside-Cooled 2-<i>μ</i>m VECSEL
324-fs Pulses From a SESAM Modelocked Backside-Cooled 2-<i>μ</i>m VECSEL Open
We present the first modelocked backside-cooled GaSb VECSEL (Vertical External Cavity Surface Emitting Laser) operating above 2 μm . Using a two quantum well InGaSb SESAM (SEmiconductor Saturable Absorber Mirror) in a V-shaped cavity arran…
View article: 50-W, >2-μJ SESAM-modelocked Ho:YAG thin-disk oscillator at 2.1 μm
50-W, >2-μJ SESAM-modelocked Ho:YAG thin-disk oscillator at 2.1 μm Open
ISSN:2100-014X
View article: High average output power from a backside-cooled 2-µm InGaSb VECSEL with full gain characterization
High average output power from a backside-cooled 2-µm InGaSb VECSEL with full gain characterization Open
We compare the gain and continuous wave lasing properties of two InGaSb-based vertical external cavity surface emitting lasers (InGaSb VECSEL) with different heat management approaches operating at a center wavelength of around . To …
View article: High-speed interband cascade infrared photodetectors: photo-response saturation by a femtosecond oscillator
High-speed interband cascade infrared photodetectors: photo-response saturation by a femtosecond oscillator Open
Interband cascade infrared photodetectors (ICIPs) combine interband optical transitions with fast intraband transport to achieve high-frequency and broad-wavelength operation at room temperature. Here we study the bias-dependent electronic…
View article: Full optical SESAM characterization methods in the 1.9 to 3-µm wavelength regime
Full optical SESAM characterization methods in the 1.9 to 3-µm wavelength regime Open
Semiconductor saturable absorber mirrors (SESAMs) are widely used for modelocking of various ultrafast lasers. The growing interest for SESAM-modelocked lasers in the short-wave infrared and mid-infrared regime requires precise characteriz…
View article: Watt-level and sub-100-fs self-starting mode-locked 2.4-µm Cr:ZnS oscillator enabled by GaSb-SESAMs
Watt-level and sub-100-fs self-starting mode-locked 2.4-µm Cr:ZnS oscillator enabled by GaSb-SESAMs Open
Femtosecond lasers with high peak power at wavelengths above 2 µm are of high interest for generating mid-infrared (mid-IR) broadband coherent light for spectroscopic applications. Cr 2+ -doped ZnS/ZnSe solid-state lasers are uniquely suit…
View article: High-speed quantum cascade detector characterized with a mid-infrared femtosecond oscillator
High-speed quantum cascade detector characterized with a mid-infrared femtosecond oscillator Open
Quantum cascade detectors (QCD) are photovoltaic mid-infrared detectors based on intersubband transitions. Owing to the sub-picosecond carrier transport between subbands and the absence of a bias voltage, QCDs are ideally suited for high-s…
View article: Nonlocal thermoelectric effects in high-field superconductor-ferromagnet hybrid structures
Nonlocal thermoelectric effects in high-field superconductor-ferromagnet hybrid structures Open
We report on the experimental observation of nonlocal spin-dependent\nthermoelectric effects in superconductor-ferromagnet multiterminal structures.\nOur samples consist of a thin superconducting aluminum wire with several\nferromagnetic t…