Coherently averaged optical frequency comb spectroscopy with a single electro-optic modulator.

We present a new, to the best of our knowledge, approach for self-heterodyne optical frequency comb (OFC) spectroscopy in which a single Mach-Zehnder modulator is utilized to generate both an optical frequency comb and a frequency-shifted local oscillator. This method allows for coherent, time-domain averaging to be performed without the need for feedback mechanisms or software corrections. As an initial demonstration, we have measured acetylene rovibrational transition frequencies with coherently averaged comb spectra.

Clinical Molecular Testing for Clonal Relatedness of Second Melanoma Tumors.

Context.—: Patients with melanoma can develop second tumors representing either metastases or new primary melanoma. This distinction has profound implications for management.

Emergency Department Workers' Perceived Support and Emotional Impact After Workplace Violence.

Introduction: Workplace violence (WPV) is a common experience among healthcare workers in the United States. Although WPV may affect workers physically, WPV can also affect workers' mental health. Emergency department (ED) workers' perceptions of available and necessary WPV support have not been previously reported.