Serrodyne optical frequency shifting for heterodyne self-mixing in a distributed-feedback fiber laser.

We describe an all-fiberized coherent detection system at 1.55 microm using heterodyne self-mixing modulation in a distributed-feedback fiber laser. Frequency shifting of the optical feedback is based on serrodyne phase modulation with an integrated electro-optic modulator, which is a significant advance in the simplification of the self-mixing detection scheme for class B lasers.

Characteristics of the Brillouin spectra in Erbium-Ytterbium fibers.

This paper reports the main characteristics of the Stokes spectra for typical pumped and unpumped Erbium-Ytterbium doped fibers. Doped fibers show shorter Brillouin shifts and their spectra are up to 1.6 times broader than undoped fibers.

Frequency of benign and malignant breast lesions in 207 consecutive autopsies in Australian women.

A histopathological study was undertaken on breast tissue dissected during the course of 207 consecutive forensic post-mortems on women over the age of 15 years in order to define the frequency and types of lesions found in Australian women. At least 10 blocks were obtained from each breast and a total of 4,738 blocks were examined. A particularly high frequency of atypical hyperplasia (12.

Incidence of perilobular hemangioma in the female breast.

The perilobular hemangioma is generally considered uncommon. We found a high incidence (11%) of this little-recognized benign mammary lesion during the course of a recently completed autopsy study designed to assess bilateral, four-quadrant, and subareolar disease of the breast in 210 consecutive forensic post-mortem examinations on female subjects between 15 and 97 years of age. Despite the lesion's name, its distribution was found to involve any of the stromal components of the breast.