Abstract
A spectrally adjustable monolithic dual-wavelength diode laser at 785 nm as an excitation light source for shifted excitation Raman difference spectroscopy (SERDS) is presented. The spectral distance between the two excitation wavelengths can be electrically adjusted between 0 and 2.0 nm using implemented heater elements above the distributed Bragg reflector (DBR) gratings. Output powers up to 180 mW at a temperature of 25°C were measured. The spectral width is smaller than 13 pm, limited by the spectrum analyzer. The device is well-suited for Raman spectroscopy, and the flexible spectral distance allows a target-specific adjustment of the excitation light source for shifted excitation Raman difference spectroscopy (SERDS).
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Lara Sophie Theurer, Bernd Sumpf, Martin Maiwald, André Müller, Jörg Fricke, Peter Ressel, Andrea Knigge, and Günther Tränkle
Appl. Opt. 61(18) 5419-5427 (2022)
Mahmoud Tawfieq, André Müller, Jörg Fricke, Pietro Della Casa, Peter Ressel, David Feise, Bernd Sumpf, and Günther Tränkle
Opt. Lett. 42(20) 4227-4230 (2017)
Martin Maiwald, André Müller, Bernd Sumpf, Götz Erbert, and Günther Tränkle
Appl. Opt. 54(17) 5520-5524 (2015)