Modulation spectroscopy
Measurement of CO2 concentration and temperature in an aero engine exhaust plume using wavelength modulation spectroscopy
... Abstract— In this paper, the 2f/1f tunable diode laser wave- length modulation spectroscopy is used for the simultaneous measurement of concentration and temperature of CO 2 in the exhaust plume of an aero ...
9
Suppression of residual amplitude modulation appeared in commercial electro-optic modulator to improve iodine-frequency-stabilized laser diode using frequency modulation spectroscopy
... fixed modulation index of ...frequency modulation spectroscopy (FMS) [7, 8] with an acousto-optic modulator (AOM) are utilized for LD fre- quency ...tude modulation (RAM) error of the EOM [9, ...
12
Strain modulation spectroscopy
... Neglecting charge compensation, the resultant splitting of the free ion energy levels by the lattice is given by the decomposition of the spherical representations, DJ, into the irreduci[r] ...
248
Modulation spectroscopy at non‐normal incidence with emphasis on the vacuum‐uv spectral region
... Expressions are given to analyze modulation spectra taken at non‐normal incidence. These expressions are used to determine the optimum angle of incidence to maximize the signal‐to‐noise ratio. Significant ...
9
An FPGA-based lock-in detection system to enable chemical species tomography using TDLAS
... Using continued development of narrow line-width laser technologies, TDLAS has evolved into a highly selective spectroscopic technique, which can detect the unique absorption fingerprints of various gases. Light emitted ...
5
External cavity diode lasers and non linear optical frequency conversion in spectroscopic applications
... optical spectroscopy because of their narrow linewidths, large tuning ranges and stable ...laser spectroscopy include remote sensing, trace gas detection and process ...of modulation ...
207
A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1f
... Abstract: A calibration-free first harmonic (1f ) wavelength modulation spectroscopy (1f - WMS) technique for gas species parameter measurement is demonstrated. In this technique, the total magnitude of the ...
12
Optical Characterization of Anisotropic Interfaces
... polarization modulation spectroscopy developed in our laboratory to investigate dynamically the orientation of molecules that undergo specific molecular orientation when irradiated by a polarized ...
173
Recovery of absolute absorption line shapes in tunable diode laser spectroscopy using external amplitude modulation with balanced detection
... wavelength modulation spectroscopy (WMS) ...the modulation frequency which is advantageous for gain and sensitivity since the second harmonic has a (nominally) zero background level (as opposed to ...
7
Mode referencing of an external cavity diode laser for continuous frequency stabilization
... using wavelength modulation spectroscopy. 14,15 共 WMS 兲 . The spectral characteristics of the ECDL were initially measured and the device showed good single-mode emis- sion at room temperature with a ...
5
Highlights on signals from Dark Matter particles
... annual modulation signature [1]. The annual modulation of the signal rate originates from the Earth revolution around the ...annual modulation signature is very distinctive since the effect induced ...
12
Toward a dynamical systems analysis of neuromodulation
... one nullcline (see figure 5b). The only change to the trace is due to the first term of equation (7). This type modu- lation is closely analogous to synaptic input in equation (1). Perturbing I γ is analogous to raising or ...
11
Research on modulation recognition with ensemble learning
... Seen from Table 1, every column includes a series of classification rate by means of three individual boosting al- gorithms. The recognition probability of eight typed signal is satisfied in all SNRs. All of the results ...
10
Time resolved infrared imaging and spectroscopy for engine diagnostics
... Not all IR bands are equally useful. The near infrared band (NIR, 0.7-1.4 µm) offers a performance/price ratio only slight- ly worse than the visible band but only offers access to emis- sion lines of water. The ...
16
Vibration spectroscopic technique for species identification based on lipid characteristics
... reflectance spectroscopy (NIR), Fourier transform infrared spectroscopy (FT-IR), and Fourier transform Raman spectroscopy (FT-Raman) applied to species identification of lipid were ...and ...
14
Stable distributions as noise models for molecular communication
... different modulation techniques, i.e., i) modulation of the release timing of the information particles, ii) modulation on the time between two consecutive information particles of the same type, and ...
7
Cascaded H-Bridge Inverter with Minimum Switches Using Hybrid Modulation Technique
... hybrid modulation scheme consist of the two pair of switches of a single H-bridge, the first pair of switches say s1 and s3 will get commutated by the fundamental pulse width modulation and next two pair of ...
6
Comprehensive Review on PN Sequence and their...
... Suzi Seroja Sarnin et. al. [2010] highlights in the paper ” Performance Study of BPSK and 8-PSK Using Cyclic Codes in CDMA Environment” the performance of BPSK and 8-PSK in Code Division Multiple Access (CDMA) ...
6
Investigation of the pulse time modulation techniques for transmission of wideband signals
... time modulation (CPTM) or some times as hybrid pulse time modulation [31, 32], is accomplished by a sequence of cascade PTM modules, where the modulated PTM signal of the first module is used as a reference ...
300
Fuzzy inference system based adaptive modulation scheme for optical wireless communication
... bandwidth. Modulation schemes well suited to conventional channel were not necessarily perform well for the optical wireless ...various modulation schemes for wireless optical communication indoor ...
15