Optical device

Details Optical device Optical device

1996-11-04

1998-03-17

Ben, Loha

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359315, 385 7, 385 8, 372 26, 372 12, G02F 103

Patent

active

057293783

ABSTRACT:
An optical device includes a semiconductor optical modulator element (46) which is connected to an end of a signal line (42) in form of a microstrip high-frequency line and whose other electrode is connected to a ground electrode (48) by a bonding wire (50). The signal line (42) includes first and second line portions (42a, 42b). The first line portion (42a) nearer to the entrance of a high-frequency signal has a width W1 determined to adjust its characteristic impedance to 50.OMEGA. and a length L1 equal to an integer multiple of 1/4 of its own guide wavelength. The second line portion (42b) has a width W2 determined to adjust its impedance to an intermediate value between the impedance of the optical modulator element 46 and the impedance of the first line portion (42a), and a length L2 equal to an integer multiple of 1/4 of its own guide wavelength.

REFERENCES:
patent: 4532632 (1985-07-01), Yamashita et al.
patent: 4763973 (1988-08-01), Inoue et al.
patent: 4941722 (1990-07-01), Hatori
patent: 5208697 (1993-05-01), Schaffner et al.
patent: 5359680 (1994-10-01), Riviere
patent: 5381426 (1995-01-01), Fontana et al.
patent: 5384798 (1995-01-01), Zucker et al.

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