To convert an energy distribution of a beam cross section into approximately a Gaussian distribution through an optical system as simple as possible and to increase the coupling efficiency to a single mode optical fiber.
A switching device includes: a heat lens forming element 11 that allows converged signal light to exit with a diverging angle larger than a normal diverging angle when a heat lens is formed by irradiation with control light 2; a mirror 80 with a hole that has a hole where signal light 5 exiting from the heat lens forming element 11 with a normal diverging angle is received by a light receiving lens 60 to collimate while changing the normal diverging angle and then passed through the hole and that receives signal light 6 exiting as diverging from the heat lens forming element 11 with a diverging angle larger than a normaldiverging angle, changes the diverging angle larger than the normal angle by the light receiving lens 60, and then specularly reflects the collimated light; and a means for separating signal light 1 propagating in the initial incident direction to the heat lens forming element 11 from signal light 7 specularly reflected by the mirror 80 with the hole and propagating in the opposite direction.
| JPH01164929 | OPTICAL SIGNAL PROCESSOR |
| JPS61151611 | BY-PASS OPTICAL SWITCH |
SHIGA NORIYASU
NAGAEDA HIROSHI
UENO ICHIRO
HIRAGA TAKASHI
TANIGAKI NOBUTAKA
YAMAMOTO NORITAKA
MIZOKURO TOSHIKO
DAINICHISEIKA COLOR CHEM
TRIMATIZ LTD
| JP2004109892A | 2004-04-08 | |||
| JP2006145757A | 2006-06-08 | |||
| JPH1026747A | 1998-01-27 | |||
| JP2005234356A | 2005-09-02 |
Jun Ishida
Next Patent: CONFOCAL TYPE LASER SCANNING FLUORESCENCE MICROSCOPE