Linear PD/LD module, linear PD/LED module, linear LD/PD module,

Details Linear PD/LD module, linear PD/LED module, linear LD/PD module, Linear PD/LD module, linear PD/LED module, linear LD/PD module,

1996-11-13

1998-07-28

Healy, Brian

Optical waveguides

With disengagable mechanical connector

Optical fiber to a nonfiber optical device connector

385 24, 385 49, 385 33, 385 89, 385 93, 372 43, 372 50, 359115, 359124, G02B 636, H01S 318, H04J 1402

Patent

active

057872155

ABSTRACT:
WDMs have been used to separate a plurality of signals spatially by the difference of wavelengths in prior bidirectional multiwavelength optical communication network. For excluding WDMs, linear PD/LD modules adopt eigen-wavelength photodiodes sensing only the light of an eigen wavelength but allowing all the wavelengths longer than the eigen wavelength. An n-member PD/LD module aligns (n-1) eigen wavelength photodiodes, PD1, PD2, PD3, . . . , PDn-1 of .lambda.1, .lambda.2, .lambda.3, . . . ,.lambda.n-1 and an LD of .lambda. n which satisfy inequalities .lambda.1<.lambda.2<.lambda.3 <. . . <.lambda. n in series on a beam line in the order of increasing the eigen wavelengths. Otherwise, an n-member PD/LED module aligns k eigen wavelength PDs of .lambda.1, .lambda.2, .lambda.3, . . . , .lambda.k and (n-k) LEDs emitting light of different wavelengths of .lambda.k+1, .lambda.k+2, .lambda.k+3, . . . .lambda. n on the beam line in the same order. On the contrary, an n-member LD/PD module aligns a .lambda.1 laser and (n-1) eigen-wavelength photodiodes PD2, PD3, . . . , PDn of .lambda.2, .lambda.3, . . . , .lambda.n in series on a beam line ( .lambda.1<.lambda.2<.lambda.3 <. . . <.lambda.n). Otherwise, an n-member LED/PD module aligns k LEDs emitting light of different wavelengths of .lambda.1, .lambda.2, .lambda.3, . . . , .lambda.k and (n-k) eigen wavelength PDs of .lambda.k+1, .lambda.k+2, .lambda.k+3, . . . .lambda. n in series on a beamline(.lambda.1<.lambda.2<.lambda.3 <. . . <.lambda.n).

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Yamada et al: "A Hybrid Integrated Optical WDM Transmitter/Receiver Module for Optical Subscriber Systems Utilizing a Planar Lightwave Circuit Platform"., Postdeadline Papers of Optical Fiber Communication "95. PD 12-2 (1995).
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