There are two types of optics for coupling a laser diode (LD) to an optical fiber: optics with a hemispherical-ended fiber, and with a discrete lens. The latter has the great advantage in alignment of the optics and the hermetic seal of the LD, but it Is difficult to develop a low-aberration lens to get high efficiency. We have realized very low-aberration optics with a truncated Si spherical lens. The Si crystal has good transparency in the 1.2-10-μm wavelength region and a high refractive index (n = 3.5), so this is suitable for low-aberratin lens material.

© 1985 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription