Bs025

Manufactured by Thorlabs

The BS025 is a broadband light source that generates optical radiation from 350 nm to 2600 nm. It utilizes a quartz-halogen lamp as the light source. The BS025 provides a stable, continuous-wave output power and is designed for applications that require a broadband light source.

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Lab products found in correlation

Det10a, by Thorlabs (1 mentions)

2 protocols using bs025

Automated Laser Power Normalization

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The beam is sampled before variable focusing using a 10:90 beamsplitter (BSR) (BS025, Thorlabs). The sampled beam is focused using a 75 mm lens (AC254-075-B-ML, Thorlabs) onto a Si photodiode (PDR) (DET10A, Thorlabs) terminated with a 56 kΩ resistor. This photodiode is used as a power reference to normalize the signal. Two additional 10:90 beamsplitters (BS1, BS2) sample the beam after focal modulation at extrema of the ETL focal range, producing peak photodiode signals at focal length minima (PD1) and maxima (PD2). Because the two measurement photodiode signals peak out-of-phase with respect to focal shift, their difference produces a monotonic response curve with respect to ETL focal power as reported previously in (46 (link))(46 (link)). Details of the ETL focal length calibration can be found in Supplementary Information section 1.2.

Humphrey P.A., Wong A.J., Vogelstein B., Zalutsky M.R., Fuller G.N., Archer G.E., Friedman H.S., Kwatra M.M., Bigner S.H, & Bigner D.D. (1990). Anti-synthetic peptide antibody reacting at the fusion junction of deletion-mutant epidermal growth factor receptors in human glioblastoma.. Proceedings of the National Academy of Sciences of the United States of America, 87(11), 4207-4211.

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Nanosecond Laser-based Flame Excitation

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The flame signal generation module is schematically depicted in Fig. S1a. A Q-switched Nd:YAG nanosecond laser (AT Laser, GlobalCure) with 15 ns pulse full-width-at-half-maximum (FWHM), 4 Hz repetition rate, and ~ 5 mm beam diameter is used as the light source. It offers output options of 1064 nm and 532 nm (second harmonic). A concave lens of f = 50 mm BEL1 (Thorlabs, LC1715) and a convex lens of f = 200 mm BEL2 (Thorlabs, LA1708) are used to expand the output beam. An f = 500 mm cylindrical lens CyL (Thorlabs, LJ1144RM) generates a laser sheet of thickness ~ 400 µm inside the kerosene flame. The burner is mounted on a translation stage so that the laser sheet can excite different positions of the flame. A half-waveplate HWP (Thorlabs, WPH10M-1064 for 1064 nm and WPH10M-532 for 532 nm) and a linear polarizer P1 (Thorlabs, GL15) are used to adjust the laser fluence. The laser sheet is polarized along the y direction. The reflected light from a 10:90 (R:T) beam splitter BS1 (Thorlabs, BS025) is picked by a power meter for laser fluence measurement.

Mishra Y.N., Wang P., Bauer F.J., Zhang Y., Hanstorp D., Will S, & Wang L.V. (2023). Single-pulse real-time billion-frames-per-second planar imaging of ultrafast nanoparticle-laser dynamics and temperature in flames. Light, Science & Applications, 12, 47.

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