Lasers and Coherent Light Sources

Pollnau, Markus

doi:10.1007/978-0-387-30420-5_11

Cited by 13 publications

(21 citation statements)

References 1,585 publications

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“…The comb is modeled here by a linear system, which is fully justified as f CEO and f rep were observed to change linearly with the pump power and cavity length, around the considered comb set point, over a broad range compared to the small changes considered in this study. Our model is described in the frequency (Fourier) domain, as is generally done for the description of closed loop transfer functions, and uses the notation commonly adopted to describe laser stabilization loops [23,24]. This approach has two advantages compared to a time domain description.…”

Section: Coupling Between the Two Comb Servo Loopsmentioning

confidence: 99%

“…Following the standard description of servo systems [23,24], each loop is composed of the three following elements:…”

Section: Coupling Between the Two Comb Servo Loopsmentioning

confidence: 99%

“…In addition to the correction signalf cor j produced by the main stabilization loop, a coupling termf coupl j originating from the other loop occurs. Following the standard description of servo systems [23,24]…”

Section: Coupling Between the Two Comb Servo Loopsmentioning

confidence: 99%

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Cross-influence between the two servo loops of a fully stabilized Er:fiber optical frequency comb

et al. 2012

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We present a study of the impact of the cross-coupling between the two servo loops used to stabilize the repetition rate f rep and the carrier-envelope offset (CEO) frequency f CEO in a commercial Er:fiber frequency comb, based on the combination of experimental measurements and a model of the coupled loops. The developed theoretical model enables us to quantify the influence of the servo-loop coupling on an optical comb line, by simulating the hypothetic case where no coupling would be present. Numerical values for the model were obtained from an extensive characterization of the comb, in terms of frequency noise and dynamic response to a modulation applied to each actuator, for both f rep and f CEO . To validate the model, the frequency noise of an optical comb line at 1.56 μm was experimentally measured from the heterodyne beat between the comb and a cavity-stabilized ultranarrow-linewidth laser and showed good agreement with the calculated noise spectrum. The coupling between the two stabilization loops results in a more than 10-fold reduction of the comb mode frequency noise power spectral density in a wide Fourier frequency range.

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Section: Coupling Between the Two Comb Servo Loopsmentioning

confidence: 99%

“…Following the standard description of servo systems [23,24], each loop is composed of the three following elements:…”

Section: Coupling Between the Two Comb Servo Loopsmentioning

confidence: 99%

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Cross-influence between the two servo loops of a fully stabilized Er:fiber optical frequency comb

et al. 2012

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“…One option is mode-locking, i.e., the coupling and phaselocking of multiple modes by periodically modulating the losses inside the laser resonator in an active or passive manner. The repetition rates of the generated pulse trains are fixed and correspond to the round-trip time of the resonator [212]. In comparison, Q-switching is an established technique where pulsed operation is achieved by periodically switching between high and low resonator losses, i.e., changing the "Q-factor" of the laser resonator.…”

Section: Generating Pulsed Laser Emissionmentioning

confidence: 99%

Diode laser based light sources for biomedical applications

Müller

Marschall

Jensen

et al. 2012

Laser & Photonics Reviews

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Diode lasers are by far the most efficient lasers currently available. With the ever-continuing improvement in diode laser technology, this type of laser has become increasingly attractive for a wide range of biomedical applications. Compared to the characteristics of competing laser systems, diode lasers simultaneously offer tunability, high-power emission and compact size at fairly low cost. Therefore, diode lasers are increasingly preferred in important applications, such as photocoagulation, optical coherence tomography, diffuse optical imaging, fluorescence lifetime imaging, and terahertz imaging. This review provides an overview of the latest development of diode laser technology and systems and their use within selected biomedical applications. 670 nm external cavity diode laser for Raman spectroscopy built on a 13 × 4 mm 2 microbench (Copyright FBH/Schurian.com).

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“…Although a lot of efforts have been put into diode laser technology, there are still some fundamental issues that limit the output power. One major problem, especially for CW lasers, is the heat generated [1]. The output power is mostly limited by heat effects causing degradation and optical damage.…”

Section: Introductionmentioning

confidence: 99%

16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers

Müller¹,

Vijayakumar²,

Jensen³

et al. 2011

Opt. Express

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Up to 16 W output power has been obtained using spectral beam combining of two 1063 nm DBR-tapered diode lasers. Using a reflecting volume Bragg grating, a combining efficiency as high as 93.7% is achieved, resulting in a single beam with high spatial coherence. The result represents the highest output power achieved by spectral beam combining of two single element tapered diode lasers. Since spectral beam combining does not affect beam propagation parameters, M 2 -values of 1.8 (fast axis) and 3.3 (slow axis) match the M 2 -values of the laser with lowest spatial coherence. The principle of spectral beam combining used in our experiments can be expanded to combine more than two tapered diode lasers and hence it is expected that the output power may be increased even further in the future.

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Lasers and Coherent Light Sources

Cited by 13 publications

References 1,585 publications

Cross-influence between the two servo loops of a fully stabilized Er:fiber optical frequency comb

Cross-influence between the two servo loops of a fully stabilized Er:fiber optical frequency comb

Diode laser based light sources for biomedical applications

16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers

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