SEMICONDUCTOR LASER APPARATUS, LIGHT PICKUP APPARATUS, AND OPTICAL DISK DRIVE APPARATUS

申请公布号：JP2003069161(A)

申请号：JP20010257844

申请日期：2001.08.28

申请公布日期：2003.03.07

申请人：

RICOH CO LTD

发明人：NAKAYAMA MASAHIKO

分类号：G11B7/125;H01S5/022;H01S5/40

主分类号：G11B7/125

摘要：PROBLEM TO BE SOLVED: To obtain a semiconductor laser apparatus where a light pickup can be designed easily. SOLUTION: In a semiconductor laser apparatus 31 having a plurality of laser chips 32 and 33 mounted to one package, interference distances (α value) of the plurality of laser chips 32 and 33 is nearly in integer multiples. When designing a light pickup, light path length in the round trip of the light pickup does not become the multiple of one α value, thus facilitating the design. More specifically, the light path length can be determined as if only one laser chip were used.

Yield and line width performance for liquid polymers and other materials

Sliding window for alert generation

Transfection complexes

Wide bandwidth attenuator input circuit for a measurement probe

Non-abrasive electrical test contact

Brain-machine interface systems and methods

Connector assembly and method having segmented body portion

Semiconductor memory device and manufacturing method thereof

Wireless router

Circuit and method for performing built-in self test and computer readable recording medium for storing program thereof

Multi-processor computing system that employs compressed cache lines' worth of information and processor capable of use in said system

Reconfigurable variable blank-holder force system and method for sheet metal stamping

Mode switching algorithm for AV block

Method and apparatus for periodic signal detection in OFDM/DMT systems

Method for initialization and stepsize control of time-domain equalizer in multi-carrier communication system

Optical storage device and optical device

Enhanced sensing in a hierarchical memory architecture

Device and method for fastener-free connection via a heat-shrinkable insert

CPP sensor with improved pinning strength longitudinal bias structure

Flexible electrochromic device and method of manufacturing the same