external laser cavity length
THz QCL self-mixing interferometry for biomedical applications
... the external target is displaced longitudinally, the laser system is swept through a set of compound cavity res- ...the laser frequency, which we accomplish by applying a linear modulation of ...
12
Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... increasing cavity length (shown in ...increasing cavity mismatch [14, ...detuning length of +1 µm in Fig. 3, detuning length of ...
12
Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser
... sorption length of the barrier turns the number of QWs into a critical design parameter. Too few wells will result in a significant fraction of the expensive 700 nm pump light being transmitted through to and ...
7
Vertical external cavity semiconductor lasers
... intra-cavity laser absorption spectroscopy ...broadened laser transition to detect weak and sharp absorption lines of gas contained within the laser ...of laser action, these absorption ...
11
Performance Analysis on a Dual External Cavity Tunable Laser ECTL Source
... Tunable lasers have wide applications in communication, especially in wave length division multiplexing (WDM), sensing application and measurements [1]-[3]. There are three specifications that must be achieved in ...
6
Fast Swept Wavelength, Low Threshold Current, Continuous Wave External Cavity Quantum Cascade Laser
... External cavity quantum cascade lasers (EC-QCLs) are widely used as reliable, broadly tunable light sources, which can provide a tuning range greater than 300 cm −1 [8] with slow scan by stepper ...The ...
5
Experimental Study of a Flash-lamp Pumped Passively Q-Switched Nd:YAG Laser Using Cr4+:YAG Saturable Absorber
... mm length) is pumped by a linear xenon flash-lamp (4 mm bore diameter and 60 mm arc ...an external trigger which allows the first ionization of the gas into the lamp by providing a high voltage pulse (15 to ...
6
100 kW peak power external cavity diamond Raman laser at 2.52 μm
... The Tm:YLF laser was used to pump a DRL at ~2.52 μm (Fig. 1). Two Brewster-cut diamonds with lengths of 4- and 5.6 mm were used, giving an overall diamond length of 9.6 mm. The diamonds had low-nitrogen ...
8
Femtosecond synchronously in-well pumped vertical-external-cavity surface-emitting laser
... The schematic structure of the VECSEL gain element and the laser cavity are shown in Fig. 1. The VECSEL wafer used in this work was grown by MOCVD. It was originally designed for conventional barrier ...
6
Investigation of near infrared laser diodes for application in space based spectroscopic gas sensing
... an external cavity diode laser is proportional to the inverse square o f the external cavity ...short external cavities (in the centimetre range) for instance, linewidths o f ...
160
Continuous wave room temperature external ring cavity quantum cascade laser
... the laser ridge. The laser chip was indium soldered epilayer up onto a copper ...focal length of 4 mm were used for collimation/coupling the light from/on to the laser ...ring cavity ...
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Mode referencing of an external cavity diode laser for continuous frequency stabilization
... detected laser radiation as a function of injection current and PZT voltage over a certain range, after passing through the 1-m gas cell containing water vapor at 25 ...wave- length, in the direction ...
5
Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization
... for laser frequency stabilization. We are able to stabilize an external cavity diode laser (ECDL) over 10 s, (a timescale suitable for, for example, laser cooling of rubidium atoms) and ...
8
Suppression of residual amplitude modulation appeared in commercial electro-optic modulator to improve iodine-frequency-stabilized laser diode using frequency modulation spectroscopy
... Many researchers have developed methods of stabiliz- ing the LD frequency to some atomic-molecular absorp- tion lines. Vu et al. performed LD frequency stabilization using both a regular LD with linear absorp- tion [5] ...
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Intracavity Tunneling Introduced Transparency in Ultrastrong coupling Regime
... the cavity dynamics. The photonic mode is coupled to the external world mostly because of the finite reflectivity of the cavity mirrors, while the intersubband transition is coupled to other ...
5
Mitigating Noise in Interferometric Gravitational Wave Detectors
... 65 servo filter drives the NPRO PZT actuator to adjust the laser frequency. The primary loop achieves a unity-gain frequency (UGF) of ∼ 15 kHz, limited by resonances in the NPRO PZT, with a resulting low-frequency ...
235
Amplitude stabilization and active control of a terahertz quantum cascade laser with a graphene loaded split ring resonator array
... (a) Measured graphene resistance (black line) and the output power of an external cavity laser (red line) for different back-gate voltage; (b) Transmission spectra of the SRR at four d[r] ...
10
Magnetostrictive magnetometer
... The combination as set forth in claim 14 further re?ector functions as an external cavity re?ector with 45 including means for adjusting the compressive stress said laser, a photodetecto[r] ...
12
Application of the Spectrum Peak Positioning Technology Based on BP Neural Network in Demodulation of Cavity Length of EFPI Fiber Optical Sensor
... sensor cavity length demodulation is not only a main way to obtain the information of gas density, but also a key part of the whole detection ...sensor cavity length, such as the intensity ...
5
Laser cavity-soliton microcombs
... reports the theoretical intensity profile in the micro-cavity. b. Intra-cavity spectrum (blue), evidencing within each micro-cavity resonance the lasing modes (red dots, red-shifted of approximately ...
14