APA Optics Inc. said it has chosen Polytec GmbH to distribute its fiber optic products in Germany. Its family of DWDM components, based on patented bulk diffraction grating technology, includes spacings of 50 to 200 GHz and up to 80 channels.   . . .   FSI International Inc. announced that Joel Elftmann will step down as a board member and chairman of its board effective Jan. 23, 2002, the date of the company's annual shareholders meeting. Don Mitchell, FSI's president and CEO, will succeed Elftmann as chairman.   . . .   Craig R. Barrett, president and CEO of Intel Corp., received the 2001 Akira Inoue Award for Outstanding Achievement in Environment, Health and Safety in the Semiconductor Industry, sponsored by the Environment, Health and Safety Division of Semiconductor Equipment and Materials International.   . . .   Super Vision, manufacturer of fiber optic and LED lighting, has hired Doug Carver as its national accounts sales manager.